Which correctly explains how to estimate 33 percent of 87?
a)round 33 percent to 20 percent and 87 to 80. think of 20 percent as 10 percent + 10 percent. find 10 percent of 80 as 8. so, 30 percent of 80 is 8 + 8, which is 16.
b)round 33 percent to 30 percent and 87 to 90. think of 30 percent as 10 percent + 10 percent + 10 percent. find 10 percent of 90 as 9. so, 30 percent of 90 is 9 + 9 + 9, which is 27.
c)round 33 percent to 35 percent and 87 to 90. think of 35 percent as 10 percent + 10 percent + 10 percent. find 10 percent of 90 as 9. so, 35 percent of 90 is 9 + 9 + 9, which is 27.
d)round 33 percent to 40 percent and 87 to 80. think of 40 percent as 10 percent + 10 percent + 10 percent. find 10 percent of 80 as 8. so, 40 percent of 90 is 8 + 8 + 8, which is 24.

if gloria has "carry over" minutes, (that is, any minutes paid for but not used in a month can be applied to her payment for minutes in the next month,) her total usage for the three months is: total minutes = 320 + 243 + 489 = 1052 minutes number of 200 minute blocks = 1052/200 = 5 r52 (that is 5 with a remainder of 52) rounding up the number of 200 minute blocks gives her usage for the three months as 6 blocks. the cost for six blocks is 6 x $25 = $150 she also has 200 - 52 or 148 carry over minutes if gloria pays each month and unused minutes are lost, applying the rounding up procedure to each month gives: first month usage of 320 minutes rounds up to 2 blocks of 200 minutes for a payment of 2 x $25 = $50 second month usage of 243 minutes rounds up to 2 blocks of 200 minutes for a payment of 2 x $25 = $50 third month usage of 489 minutes rounds up to 3 blocks of 200 minutes for a payment of 3 x $25 = $75 total payments for the three months are $50 + $50 + $75 = $175 get the plan with carry over minutes!

im guessing (23,14). hope this : )

the answer to this is a. a^2 + b^2 = c^2