The average annual cost of tuition, room, and board for public colleges and universities has been growing
exponentially by 6.17% each year since the year 1981.
The average cost of tuition, room, and board in 1981
was $2665.32.
Part B: If this trend continues, what will the average
cost of tuition, room, and board be in 2022?

add all the numbers and check the ones place.

the answer is 486. as the ones place is more than 4, the estimation will be the next 10 ie, 490

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.

12

step-by-step explanation:

12 + 5 = 17

12x2=24

24-7=17