# Algebra

Radio signals travel at a rate of 3*10^8 meters per second. How many seconds would it take for a radio signal to travel from a satellite to the surface of Earth if the satellite is orbiting at a height of 4.2*10^7 meters? (Hint: Time is distance divided by speed.)

a. 1.26*10^16 seconds
b. 1.26*10^15 seconds***
c. 1.4*10^1 seconds
d. 1.4*10^-1 seconds

1. 👍 0
2. 👎 0
3. 👁 2,146
1. a and b are clearly wrong. You have multiplied instead of dividing. Read the hint.

When you divide, you subtract exponents, not add.

1. 👍 0
2. 👎 7
2. Your answer would be -1, because you are subtracting 8 from 7.

1. 👍 1
2. 👎 1
3. Your answer would be -1, because you are subtracting 8 from 7. so it is D.

1. 👍 6
2. 👎 2

## Similar Questions

1. ### physics

A boat initially traveling at 10 meters per second accelerates uniformly at the rate of 5.0 meters per second squared for 10 seconds. How far does the boat travel during this time?

2. ### Physics

The hare and the tortoise are at the starting line together. When the gun goes off, the hare moves off at a constant speed of 10 meters per second. (Ignore the acceleration required to get the animal to this speed.) The tortoise

3. ### algebra

a cyclist rides her bike at the speed of 18 kilometers per hour what is this rate in meters per second how many meters will the cyclist travel in 2 seconds

4. ### Math

Ms. Sue please help! A radio signal travels at 3.00 • 10^8 meters per second. How many seconds will it take for a radio signal to travel from a satellite to the surface of Earth if the satellite is orbiting at a height of 3.54

1. ### physics

a bus moving at 20m/s slows at a rate of 4m/s each second. how far does it travel while braking. i found the time which was 5 seconds. A car accelerates from rest at a rate of 5 m/s/s for a period of 4.2 seconds and then moves at

2. ### Calculus (Derivatives)

Two particles are moving in straight lines. The displacement (in meters) of particle 1 is given by the function e^(4cos(t)) , where t is in seconds. The displacement (in meters) of particle 2 is given by the function -(t^3)/(3) -

3. ### math

Write the ratio has a unit rate 8 meters to 10 seconds 1)0.8 meter per second 2)1.125 meters per second 3)2 meters per second 4)80 meters per second

4. ### Math

Radio signals travel at a rate of 3x10^8 meters per second.how many seconds would it take for a radio signal to travel from a satellite to the surface of earth if the satellite is orbiting at a height of 3.6x10^7 meters? A. 8.3

1. ### Physics

A car traveling at 22.0 m/s accelerates for 2.37 seconds at a rate of 2.25 m/s2. How far will it travel in meters during this time? (22.0)(2.37) +1/2(2.25)(2.37)= answer 58.5m right?

2. ### Physics 11

An FM radio station transmits radio signals that have a wavelength of 3.2m. Where would you have to adjust your tuner in order to pick up its music? Note: FM waves are measured in MHZ I have no idea where to go with this... Thank

3. ### MATH

A yellow jacket can fly 4.5 meters in 9 seconds. find the unit rate in meters per second .

4. ### Math

CLICK HERE |!!!!PLEASE HELP WITH THISS!!!. Lesson 9: Exponents and Exponential Functions Unit Test CE 2015 Algebra 1 B Unit 2: Exponents and Exponential Functions 1.-(6)^-1 6 1/6 -1/6 -6 2. (-8.3)^0 1 -1 0 -8.3 3. -1/a^-2 -a^2