(b) Carlos removed 56 fish from his pond over a period of 7 days. He removed the same number
of fish each day. What was the change in the number of fish in the pond each day?
fish

-8

Step-by-step explanation:

56÷7=8

Then since this is decreasing (removing fish) we convert: -8

Then there is your answer the other person was very close!

angle addition postulate

2x=56

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.