The average distance from Earth to Mars is 2.25×108 km, and the distance from Earth to Neptune is 4.3514×109 km. How much farther is Neptune from Earth than Mars? Express your answer in scientific notation. Do not round your answer.(1 point)
km
To find the distance between Neptune and Mars, we need to subtract the distance between Mars and Earth from the distance between Neptune and Earth.
Neptune - Mars = (4.3514×10^9 km) - (2.25×10^8 km)
Now, we subtract the two distances:
4.3514×10^9 km - 2.25×10^8 km = 4.1264×10^9 km
Therefore, Neptune is 4.1264×10^9 km farther from Earth than Mars.
Human hair grows at a rate of about 6.849×10−4 cm per hour to 2.329×10−2 cm per hour. The rate depends on gender, genetics, age, and health. Find the difference between the high end and the low end of the range. Express your answer in scientific notation. Do not round your answer.(1 point)
cm per hour
To find the difference between the high end and low end of the range, we subtract the low end value from the high end value.
High end - Low end = (2.329×10^(-2) cm/hr) - (6.849×10^(-4) cm/hr)
Now, we subtract the two values:
2.329×10^(-2) cm/hr - 6.849×10^(-4) cm/hr = 2.23015×10^(-2) cm/hr
Therefore, the difference between the high end and low end of the range is 2.23015×10^(-2) cm/hr.
Find 0.078−(5.2×10−3) . Express your answer in scientific notation. Do not round your answer.(1 point)
×10−2
To subtract the two numbers, we simply subtract the corresponding parts.
0.078 - (5.2×10^-3) = 0.0768
Therefore, the answer is 0.0768 × 10^-2.
Earth’s radius is approximately 3,959 miles, while Jupiter’s radius is approximately 4.3441×104 miles. How much bigger is Jupiter’s radius compared to Earth’s? Express your answer in scientific notation. Do not round your answer.(1 point)
×
miles
To find how much bigger Jupiter's radius is compared to Earth's, we need to subtract Earth's radius from Jupiter's radius.
Jupiter's radius - Earth's radius = (4.3441×10^4 miles) - (3.959 miles)
Now, we subtract the two values:
4.3441×10^4 miles - 3.959 miles = 4.344096×10^4 miles
Therefore, Jupiter's radius is 4.344096×10^4 miles bigger than Earth's radius.