Suppose that a ball is thrown into the air with an upward velocity of 4 feet per second from a building that is 20 feet high. The equation that gives the height of
the ball above the ground at time t, in seconds, is h = 20 + 4t - 16t2.
Determine after how many seconds since the ball was released will it hit the ground?
seconds

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.

answer: what is the question you're trying to ask?

step-by-step explanation: