Two sisters drove 144 miles on a camping trip. they averaged at least 32 miles per gallon on the trip. describe the number of gallons of gas they used.

For this case, the first thing we must do is define variables.

We have then:

n: number of gallons

d: distance traveled

r: distance rate per gallons

The equation that relates the variables is given by:

Substituting values we have:

The number of gallons of gas they used is:

a; x = 0.5

step-by-step explanation:

-10x = -5

x = 0.5

the largest number of the four options is 1.8 x 10-2

you have it in scientific notation.

1.80 x 10-6   = 0.00000180

1.80 x 10-4   = 0.000180 (bigger, or "less small", than the former one)

so

1.8 x 10-2       = 0.0180. as you see. the "less small", or the biggest one of them all.

as you have negative exponent, it means you are dividing 1.8 by 100 (i.e. moving the dot towards left, two times).

if you had positive exponent for the scientific notation, power of tenths, you would be multiplying times 100 (moving the dot towards right) as below:

1.8 x (10)2 = 180

so. if you have negative exponent in scientific notation, move the dot toward left. if it is positive, toward right as many times the exponent tells you.