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Yuliya22 [10]
3 years ago
12

Petra invests $10,800. After 4 years she has earned $3240 in interest.

Mathematics
1 answer:
sweet-ann [11.9K]3 years ago
6 0

Answer:

Rate =interest*100/principal*time

Rate = 7.5%

Step-by-step explanation:

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There were 60 ducks living in a pond. If the number living at the pond increased by 30%, how many ducks now live at the pond?
timama [110]

Answer:

78

Step-by-step explanation:

You take the original total: 60, and multiply it by 30 to get 1,800. You then divide 1,800 by 100 to get 18. 18 is your 30%. Now, you add the 30% to 60 getting your total number of ducks: 78.

The equation version:

\frac{a}{60} = \frac{30}{100}

It is just proportions.

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Step-by-step explanation:

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Step-by-step explanation:

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3 years ago
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This is incomplete. What do you need to find? There's not enough information to figure out what to do.

Step-by-step explanation:

7 0
3 years ago
Evaluate the following expressions if ×=2,y=3 and Z=4. a.4×+×-3over ×+10 b.2y-5yover y+5. c.yz-×. d.9+y+zover y+2​
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Answer:

A= 7 11/12 or 7.916 or  95.12

B= 4 1/8 or 4.125 or 33/8

C=  12 4/5 or 12.8 or 64/5

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