Question

In a given year, about 1.52 × 1010 pieces of first-class mail are delivered in the U.S. If each piece of

mail carries a stamp costing $0.55, what is the total cost in dollars to deliver all the pieces? Write the
answer in scientific notation, expressed to the exact decimal place.

Answer 1

[AI-generated answer — Bot GPT 3.5]

The total cost in dollars to deliver all the pieces can be calculated by multiplying the number of pieces of mail by the cost of each stamp:

1.52 × 10^10 * $0.55 = 8.36 × 10^9 dollars

Therefore, the total cost is 8.36 × 10^9 dollars.

Answer 2

[AI-generated answer — Step-by-Step Bot]

To find the total cost to deliver all the pieces of first-class mail, we need to multiply the number of pieces of mail by the cost of each stamp.

Number of pieces of mail = 1.52 × 10^10

Cost of each stamp = $0.55

Total cost = Number of pieces of mail × Cost of each stamp

Total cost = 1.52 × 10^10 × $0.55

Multiplying these values, we get:

Total cost = 8.36 × 10^9

Expressing the answer in scientific notation to the exact decimal place, the total cost to deliver all the pieces of mail is 8.36 × 10^9 dollars.

Answer 3

[AI-generated answer — Explain Bot]

To calculate the total cost in dollars to deliver all the pieces of mail, we need to multiply the number of pieces of mail by the price of a stamp.

The number of pieces of mail delivered is given as 1.52 × 10^10 (scientific notation).

The price of a stamp is $0.55.

To get the total cost, we multiply these two values:

Total cost = (1.52 × 10^10) * $0.55

To multiply numbers in scientific notation, we multiply the coefficients and add the exponents:

Total cost = 1.52 * 0.55 * 10^10

Multiply the coefficients: 1.52 * 0.55 = 0.836

Now we multiply this by 10^10:

Total cost = 0.836 * 10^10

This can be written in scientific notation as 8.36 × 10^9 dollars, expressed to the exact decimal place.

Answer 4

What is 5.5 x 104 multiplied by 2.2 x 10-8? Write the answer in scientific notation. (1 point)

O 1.21 × 10-5
O 1.21 × 10-3
O 1.21 x 10-4
O 12.1 x 10-4

Answer 5

[AI-generated answer — Bot GPT 3.5]

To multiply numbers in scientific notation, we multiply the coefficients and add the exponents.

For 5.5 x 10^4 multiplied by 2.2 x 10^-8:

(5.5 * 2.2) * 10^(4 + (-8)) = 12.1 * 10^-4

Therefore, the answer is 1.21 × 10^-3 in scientific notation.

Answer 6

When multiplying two numbers in scientific notation, what operations do you use on the coefficients

and the exponents of the powers of 10? (1 point)
O Add the coefficients and multiply the exponents of the powers of 10.
O Multiply the coefficients and multiply the exponents of the powers of 10.
O Add the coefficients and add the exponents of the powers of 10.
O Multiply the coefficients and add the exponents of the powers of 10.

Answer 7

[AI-generated answer — Bot GPT 3.5]

The correct answer is: Multiply the coefficients and add the exponents of the powers of 10.

Answer 8

A tape dispenser holds 1.14 x 104 mm of tape that is 12.7 mm wide. Multiply the two numbers to

find the total area in square millimeters of tape. Write the product in scientific notation. (1 point)
O 14.478 × 104 mm?
O 1.4478 × 104 mm?
O 1.4478 × 105 mm2
O 14.478 × 105
mm?

Answer 9

[AI-generated answer — Bot GPT 3.5]

To find the total area in square millimeters of tape, we multiply the length of the tape by the width of the tape:

1.14 x 10^4 mm * 12.7 mm

To multiply these two numbers, we multiply the coefficients and add the exponents:

1.14 * 12.7 * 10^(4 + 0) = 14.478 * 10^4 mm^2

Therefore, the product is 1.4478 × 10^5 mm^2 in scientific notation. Hence, the correct answer is O 1.4478 x 10^5 mm^2.

Answer 10

A sugar cube has a volume of about 4.9 ml. What is the total volume in milliliters of 1.5 x 10--> 6 sugar

cubes? (1 point)
O 7.35 x 10--> 6 ml
O 0.735 x 10--> 7 m
O 735 × 10--> 5 ml
O 7.35 × 10--> 7 ml

Answer 11

[AI-generated answer — Bot GPT 3.5]

To find the total volume in milliliters of multiple sugar cubes, we need to multiply the volume of one sugar cube by the number of sugar cubes.

Volume of one sugar cube = 4.9 ml

Number of sugar cubes = 1.5 x 10^6

To multiply these two values, we multiply the coefficients and add the exponents:

(4.9 ml) * (1.5 x 10^6 cubes) = (4.9 * 1.5) * 10^(6 + 0) ml

= 7.35 * 10^6 ml

Therefore, the total volume is 7.35 x 10^6 ml. Thus, the correct answer is O 7.35 x 10^6 ml.

Answer 12

Multiply 0.75 by 2.8 x 10-5. (1 point)

O 2.1 × 10-5
O 21 x 10-7
O 2.1 x10-4
O 2.1 x 10-6

Answer 13

[AI-generated answer — Bot GPT 3.5]

To multiply 0.75 by 2.8 x 10^-5, we multiply the coefficients and add the exponents.

0.75 * 2.8 x 10^-5 = 2.1 x 10^-5

Therefore, the answer is O 2.1 x 10^-5.