Raquel works in a pet store every day after school and sometimes on weekends. she earns $5.20 per hour. if raquel works 21 hours a week, use front-end estimation to find out about how much she will earn in four weeks. a. $360 b. $400 c. $480 d. $520

$5.20 in front-end estimation: $5.00

21 in front-end estimation: 21

Multiply $5.20×21

$5.20×21= $100 a week.

$100 a week multiplied by 4 weeks $400.

$100×4= $400

I hope this help's!

-LizzyIsTheQueen

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer

relating to or denoting a system of numbers and arithmetic based on the number ten, tenth parts, and powers of ten.

step-by-step explanation: