Answer:
7 hours working as a lifeguard and 8 hours walking dogs
Step-by-step explanation:
16×7=122 and 6×8=48
122+48=160
She would be 67...always going to be 3 years younger
Recall that

which means

Now,
could be positive or negative, which means
. If we specifically knew the sign of
was positive, then we can simplify and write

or if it's negative,

we have to find sum of even integer between 30 and 70
first term is 32


......

common difference is

firstly , we will find n
we can use formula



now, we can find sum

.............Answer
She can have 11 rows with 3 in the last row and she can have 6 rows with 3 in the last row