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Questions (5)
whats the celstial sphere?
1 answer
314 views
Hi, so i reallllyy need help, i have an assignment that i have to complete, but the thing is theres a file and this site doesn't
3 answers
565 views
When an airplane leaves the runway, its angle of climb is 24° and its speed is 345 feet per second. How long will it take the
3 answers
858 views
Which one is more stable, [PCl4]+ or [PCl6]- ? Why?
I'm thinking it has something to do with the fact that the former is
3 answers
1,331 views
Consider a cube of side 100cm. Consider two diaganolly opposite points (the main body diagnol) as A and B. The cube is kept flat
4 answers
750 views
Answers (465)
In a binomial distribution, the probability of the event happening (and not happening) must remain constant in all trials. This occurs when the removed card is replaced, and not when the removed card remains unreplaced.
Step 1: Make a frequency distribution table. I will refer to each of the values (number of cars) as x(i) and each of the frequencies as f(i) Step 2: Finding the mean: Mean = Σ( x(i)*f(i) ) / (Total number of salespersons)
Yes, D is the correct answer.
Loss of body heat is a function of surface area per unit volume. The higher an organism's volume, the higher its metabolic activity and internal heat production. The higher an organism's surface area, the quicker it loses heat to the atmosphere (humans do
I don't know much about programming, but I don't believe that "calculate the percentage of a student" is the full question.
- 0.4 * n ≤ 6.8 Divide both sides by 0.4: - n ≤ 17 Multiply both sides by -1: (Note that multiplying or dividing by a negative number changes the direction of the inequality) n ≥ -17
Assuming that the food drive lasted only two weeks, Number of cans collected in the second week = c The total number of cans must be more than 410: 185 + c > 410 Simply to obtain an inequality for c.
Induced emf = - (Rate of change of magnetic flux) = - (Change in magnetic flux)/(Change in Time) = - d(Ф)/dt = - (Final magnetic flux - Initial Magnetic Flux)/0.5 = - (B*A*cos(θ2) - B*A*cos(θ1))/0.5 = - B*A( cos(θ2) - cos(θ1) )/0.5 Your question gives
z^2 - 4z + 5 = 0 (Note that the square of i is equal to -1) (2 + i)^2 - 4(2 + i) + 5 = 4 + (i^2) + 4i - 8 - 4i + 5 = 4 - 1 - 8 + 5 = 9 - 9 = 0 Hence, yes, it is a solution.
Do you mean: 2(y + 1) = 2 ? In that case: 2(y + 1) = 2 Divide by two on both side (y + 1) = 1 y + 1 = 1 Subtract one from both sides y = 0
Note that in a linear differential equation, the y' term is not supposed to have any coefficient. Hence, you must turn the differential equation into this form. [1/(x^2+1) * y'] + xy = 3 Multiply the whole equation by (x^2 + 1) y' + [x*(x^2 + 1)]*y = 3(x^2
Slope = (y2 - y1)/(x2 - x1) = (-10 + 5)/(-9 + 2) = (-5)/(-7) = 5/7 The correct answer is C. Always try to recheck your work. If you imagine the given points on the cartesian plane, you will see that they are on a line moving upwards, which must therefore
The longest straight line in this case is given by the diagonal of the rectangle. You can find its length by using the Pythagorean theorem. x^2 = (2.2)^2 + (1.2)^2 Solve for x.
Yes, D is correct.
For finding an unknown molarity of a substance in a titration, we use the following formula: (M1 * V1) / (M2 * V2) = (n1 / n2) Where, M1 = Molarity of chemical 1 M2 = Molarity of chemical 2 V1 = Volume of chemical 1 V2 = Volume of chemical 2 n1 =
Write down the reaction: NaCl + Ag(+) ---> AgCl + Na(+) The main thing to note here is that 1 mol of NaCl reacts completely with 1 mol of silver to form the required product. How many moles of Ag do we have? (It will be equal to the number of moles of
Original oil = 550 l How much was sold? Two-fifths of 550 l = (2/5)*550 = 2*110 = 220 l How much remained? 550 - 220 = 330 How much of the remaining was poured out? One-fifth of the remaning = (1/5)*330 = 66 Finally, how much remained? 330 - 66 = 264
Usually, you would input x as 0 (to find intersection on the y-axis) and y as 0 (to find intersection on the x-axis) However, the graph of xy = 12 is a rectangular hyperbola. It does not meet either of the co-ordinate axes. Numerically, When x = 0, 0*y =
It will cross the y-axis when x = 0 y = 2(0) + 6 y = 6 It will cross the x-axis when y = 0 0 = 2x + 6 2x = -6 x = -3 Yes, you are correct.
5 is V 40 is XL 5:40 am -> V:XL am 6 is VI (There is no symbol for '0' in the roman numeral system) 6:00 pm -> VI:00 pm
You need not mention the 'zero and,'. You can directly state the given number as 'twenty-five hundred-thousandths'.
(I shall use the Cartesian Sign Convention) Object distance = u = - 60cm Focal length = f = + 20cm (The focal length of a converging lens is taken as positive) Image distance = v As per the lens formula, (1/v) = (1/u) + (1/f) (1/v) = (1/20) - (1/60) v = 30
y = 8x - 14 y = x^2 + 4x - 10 From these equations, you get: 8x - 14 = x^2 + 4x - 10 4x - 4 = x^2 x^2 - 4x + 4 = 0 (x - 2)^2 = 0 x - 2 = 0 x = 2 So, the x-coordinate of the solution is 2. You can simply plus this into either equation to find the
Bolaji, the molecular mass of the given compound is NOT 512. The compound calcium phosphate should be written as Ca3(PO4)2, and has a mass of 310 u. You do not multiply the masses of calcium and phosphate, this is not an algebraic equation. You add the
Based on the answer I gave to your previous question, what would (f-g)(x) mean?
This answers this question and the next: (f + g)(x) means that you have to add both f(x) and g(x). (f + g)(x) = x^2 − 36 + x^3 + 2x^2 − 10 (You have to simplify this) Similarly, (f * g)(x) means that you have to multiply f(x) and g(x).
Refractive Index = (Speed of light in vacuum)/(Speed of light in medium) Speed of light in vacuum = 3 x 10^8 m/s Refractive Index = 1.33 1.33 = (3 x 10^8)/(x) Solve for x.
Most attenuation will occur when the current is highest. For an LCR circuit, as is given, this occurs at the condition of resonant frequency. For the required condition, ω = 1/(√LC) Plug in the values of L and C.
Assuming the given expression is n(t) = n(0) * e^(0.15t), Given: In the year 1995, t = 0 n(0) = 20 a) t = 10 n(t) = n(0) * e^(0.15t) = 20 * e^(0.15*10) = 20 * e^(1.5) b) n(t) = 400 n(t) = n(0) * e^(0.15t) = 20 * e^(0.15*t) 400 = 20 * e^(0.15*t) Solve for
Yes, one of the angles turns out to be 78.5 degrees.
This requires the dimensions of the tiles, which requires the given diagram.
Area of the rectangle = Product of the sides = (6 * 8) square ft = 48 sq ft Area of the square = Square of the side length = s^2 (Taking s as the side length) This is equal to the area of the rectangle. So, s^2 = 48 s = √48 s = 4√3 ft
Use the distributive property: (∛x +2)(∛(x^2)-2∛x +4) = (∛x)(∛(x^2)) + 2(∛(x^2)) + (∛x)(-2∛x) + 2(-2∛x) + 4(∛x) + 4*2 (When the same base with different exponents is multiplied, the exponents are added, also, ∛x = x^(1/3), ∛(x^2) =
The inference you can make this reaction is that Aluminum oxide is a basic oxide, because it forms a salt upon reacting with a base. (Do keep in mind, however, that Al2O3 is amphoteric. From this reaction, you can only infer its basic nature)
Only the xylem parenchyma is living, the answer is A.
The first step that takes place in the amide formation reaction, is that the :NH3 molecule (the semicolon represents the lone pair) donates its lone pair to the carbon atom (which is connected to the oxygen atom), forming a bond. The more electrophilic
The reason the test works is because the Fe(3+) ion formed reacts with the benzoate ion formed to give a coloured solution. However, in an excess of alkali, the Fe(3+) ion instead reacts with the OH(-) ions in order to form ferrous hydroxide, which
A characteristic of personality is that its core remains mostly stable throughout a person's life even in the presence of changing situational factors. However, it is also dynamic in the sense that an individual can show a wide range of traits to adapt to
C, Disassemble the nucleus (into its individual protons and neutrons)
We need all values of x for which y is positive or zero. So, x²-6x+9 is either positive or zero. x²-6x+9 ≥ 0 x²-6x ≥ -9 (x - 3)^2 - 9 ≥ -9 (x - 3)^2 ≥ 0 x - 3 ≥ 0 x ≥ 3
(a - b)^n = Sum of all [(-1)^r]*(nCr)*(a^r)*[b^(n-r)] Where 'r' varies from 0 to n. a = 2 b = (1/4)x n = 4 r = 0,1,2,3,4 Plug in the values, sum it up.
Yes, b is correct.
Probability that a student is x inches tall = (Number of students who are x inches tall)/(Total number) In this case, the total number is the sum of all individual frequencies, which is 28 The number of students who are 52 inches tall = 6 Probability that
John's age = x Age in three years = Three times as old as today (x + 4) = 3*x x + 4 = 3x 4 = 3x - x 4 = 2x x = ?
Cost of one box = 2800 Cost of 40 boxes = 40 * 2800 = 112000 Discount = 4% of 112000 = 0.04 * 112000 = 4480 Amount paid = Price - Discount = 112000 - 4480 = ?
Interest = Final - Initial = 1344 - 1200 = 144 Interest = Principal amount * Rate * Time 144 = 1200 * 0.06 * t 144/(1200*0.06) = t 144/72 = t 2 = t The time is two years.
hog = h(g(x)) = h(-x+3) = √(-x+3) The term in the square root cannot take negative values. It must be greater than (or equal to) zero. -x + 3 >= 0 -x >= -3 x =< 3 Hence, the domain of x is given by (-∞, 3]
Length of billboard = x Width of billboard = (100/x) Length including margin = x + 4 + 4 = (x+8) Width including margin = (100/x) + 2 + 2 = (100/x + 4) The total area is given by: (x+8)*(100/x + 4) = 100 + (800/x) + 4x + 32 = 4x + (800/x) + 132 This is the
Is there any specific portion in these questions you do not understand? You've posted quite a few problems without any of your attempts to solve them.
204 grams of sugar dissolve in 100 g of water. => 1 gram of sugar dissolves in (100/204)g of water => 612 grams of sugar dissolves in 612*(100/204)g of water
