1. kristi jogged for 3/5 of an hr,swam 1/2 of an hr, rode her bike 3/4 of an hr how long did she exercise?=1 7/20

2.the intersest rate on an equity line of credit was 7 7/8% last month this month the interset rate is 10 3/2% how many percentage points has the interset rate inmcreased? 3 5/8

The first one is correct. 1 17/20. If you want to put it into minutes, that is 111 minutes or 1 hour 51 min. Check my arithmetic.

The second one, I think you meant something other than 10 3/2%.

thanks unfortunatley that's what it is 10 3/2%

In that case, 3 5/8 percentage points is correct.

To find the answer to the first question, we need to add up the time Kristi spent jogging, swimming, and riding her bike.

The time Kristi spent jogging is 3/5 of an hour.
The time Kristi spent swimming is 1/2 of an hour.
The time Kristi spent riding her bike is 3/4 of an hour.

To add these fractions, we need to have a common denominator. In this case, the least common denominator is 20.

To convert the fractions to have a denominator of 20:
- The fraction 3/5 can be multiplied by 4/4 to get 12/20.
- The fraction 1/2 can be multiplied by 10/10 to get 10/20.
- The fraction 3/4 can be multiplied by 5/5 to get 15/20.

Now that all the fractions have a common denominator, we can add them up:

12/20 + 10/20 + 15/20 = 37/20

The fraction 37/20 can be simplified to a mixed number.

Divide 37 by 20:
37 ÷ 20 = 1 with a remainder of 17.

So the mixed number is 1 17/20.

Therefore, Kristi exercised for 1 hour and 17/20 of an hour, which can be written as 1 7/20.

To find the answer to the second question, we need to calculate the difference between the interest rates of the two months.

Last month's interest rate was 7 7/8%.
This month's interest rate is 10 3/2%.

To calculate the difference, subtract the two interest rates:

10 3/2% - 7 7/8%

To subtract fractions, we need to have a common denominator. In this case, the least common denominator is 8.

To convert the fractions to have a denominator of 8:
- The fraction 7/8 can stay the same.
- The fraction 3/2 can be multiplied by 4/4 to get 6/8.

Now we can subtract the fractions:

10 - 7 = 3
6/8 - 7/8 = -1/8

So the difference in the interest rates is 3 - 1/8.

To convert the mixed number to an improper fraction, we multiply the whole number by the denominator and add the numerator:

3 * 8 = 24
24 + 1 = 25

The improper fraction is 25/8.

Therefore, the interest rate has increased by 3 5/8 percentage points.