Circle a has a diameter of approximately 20 in and an area of 300 in the power of 2. circle b has a diameter of approximately 60 in. which one of these could be the area of circle b? explain your reasoning.
1. about 100 in by the power of 2
2. about 300 in by the power of 2
3. about 900 in by the power of 2
4. about 2,700 in by the power of 2

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.

can you put the picture up?

step-by-step explanation: