Lavonne estimated 38% of 63 by rounding 38% up to 40%, rounding 63 up to 70, and then multiplying 70 by 0.4 to get 28. is her estimate reasonable? no, because she should have rounded 38% down to 30%. no, because she should have rounded 63 down to 60. yes, because she correctly rounded 38% up to 40%. yes, because she correctly rounded 63 up to 70.

The correct option is B) No, because she should have rounded 63 down to 60.

Step-by-step explanation:

Consider the provided information.

Rules for rounding up:

If the number is followed by 1,2,3,4 round the number down and if the number is followed by 5, 6, 7, 8, or 9, round the number up.

Lavonne round 38% up to 40% which is the correct round up.

Lavonne round 63% up to 70% which is not the correct round up.

She should have rounded 63 down to 60.

Therefore, the correct option is B) No, because she should have rounded 63 down to 60.

n=9

step-by-step explanation:

7 times a number = 7n

decreased by 13 = 7n-13

same as is =

5 times the number = 5n

increased by 5 = 5n+5

7n-13 = 5n+5

2n=18

n=9