0. The length of a rectangle is 4r2s5t3 units, and the rectangle's area is 20r5sta square
units. If r#0, S70 and t#0, which of the following best describes the width of the rectangle?
TEKS 5.80)
a) 5r3sat units
b) 5r7g12t7 units
c) 16r3sat units
d) 2487$12t7 units

answer is a

step-by-step explanation:

(a) the volume of the cone is 20/3 in3

hence, option a is correct.

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.