A strand of hair has an average mass of 2.17×10−5 ounces. A grain of rice has an average mass of 0.002 ounces. How much heavier is a grain of rice than a strand of hair? Express your answer in scientific notation.(1 point)
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ounces
To find out how many miles light travels in a year, we can multiply the speed of light by the number of seconds in a year.
The speed of light is approximately 1.9×10^5 mi/sec, and there are about 3.2×10^7 seconds in a year.
1.9×10^5 mi/sec * 3.2×10^7 sec/year = 6.08×10^12 miles
Therefore, light travels approximately 6.08×10^12 miles in a year.
To find out how many meters the tectonic plate would move in 2x10^6 years, we can multiply the average rate of movement by the number of years.
The average rate of movement is 0.006 m/year.
0.006 m/year * 2x10^6 years = 12,000 m
Therefore, the tectonic plate would move approximately 12,000 meters in 2x10^6 years.
An asteroid is heading toward Mars at the rate of 7.7×104 mi./hr. If the asteroid is 3.311×108 miles away from Mars, how many hours will it be before it hits Mars? Write the answer in scientific notation, expressed to the exact decimal place.(1 point)
hours
To calculate how many hours it will be before the asteroid hits Mars, we can divide the distance between the asteroid and Mars by the rate at which the asteroid is moving.
The rate at which the asteroid is moving is 7.7×10^4 mi/hr, and the distance between the asteroid and Mars is 3.311×10^8 miles.
(3.311×10^8 miles) / (7.7×10^4 mi/hr) = 4296.3636 hours
Therefore, it will be approximately 4296.3636 hours before the asteroid hits Mars.
bot gpt, can you answer it in scientific notation
A field of 3.9 mi2 is being subdivided into 1.3×103 family gardens. How many square miles will there be in each garden? Write the answer in scientific notation.(1 point)
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To find out how many square miles there will be in each garden, we can divide the total area of the field by the number of family gardens.
The total area of the field is 3.9 mi^2, and there are 1.3×10^3 family gardens.
3.9 mi^2 / (1.3×10^3) = 0.003 mi^2
We can express this number in scientific notation as 3×10^-3 mi^2.
Therefore, each garden will have an area of 3×10^-3 mi^2.
To find out how much heavier a grain of rice is compared to a strand of hair, we can subtract the mass of the hair from the mass of the rice.
The mass of a grain of rice is 0.002 ounces, and the mass of a strand of hair is 2.17×10^(-5) ounces.
0.002 - 2.17×10^(-5) = 0.0019783 ounces
We can express this number in scientific notation as 1.9783×10^(-3) ounces.
Therefore, a grain of rice is 1.9783×10^(-3) ounces heavier than a strand of hair.
Light travels at an approximate rate of 1.9×105 mi./sec. There are about 3.2×107 seconds in a year. About how many miles does light travel in a year? Write the answer in scientific notation. Express the answer to the exact decimal place.(1 point)
miles
The average tectonic plate moves at the rate of 0.006 m per year. How many meters would it move in 2×106 years? Write the answer in scientific notation, expressed to the exact decimal place.(1 point)
m