The average speed for the first 400 miles was 50 mph. the average speed for the next 600 miles was 40 mph. what should be the average speed for the next 650 miles be so that the overall average speed would be 50 mph?

8y^50

step-by-step explanation:

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.

i’m here for points.

$119.20

step-by-step explanation:

$372.50 - 60% off is $149. $149-20% off is $119.20