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wariber [46]
3 years ago
10

Peter deposited $8,975 into a savings account 21 years ago. The account has an interest rate of 3.8% and the balance is currentl

y $19,909.20. How often does the interest compound?

Mathematics
1 answer:
Alexus [3.1K]3 years ago
4 0
The formula for the future value of the account is
  A = P(1 + r/n)^(nt)
where you have
  A = 19909.20
  P = 8975
  r = 0.038
  t = 21

The resulting equation is not one that can be solved by algebraic means, but we can use a graphing calculator to find n. This graph shows us n = 12, so

the interest compounds monthly.

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A puzzle piece in the shape of a triangle has perimeter 25 centimeters. Two sides of the triangle are each twice as long as the
Anestetic [448]

Answer: the shortest side is 10 centimeters.

The length of each of the other sides is 10 centimeters each.

Step-by-step explanation:

Let x represent the length of the shortest side of the triangle.

Two sides of the triangle are each twice as long as the shortest side. This means that the length of the two sides would be 2x.

The perimeter of a triangle is the sum of each side of the triangle.

The puzzle piece in the shape of a triangle has perimeter 25 centimeters. This means that

x + 2x + 2x = 25

5x = 25

x = 25/5

x = 5

The length of each of the two sides is

2x = 2 × 5 = 10

3 0
3 years ago
Find the value of X.
tatuchka [14]
This is the correct answer

4 0
1 year ago
What is the reciprocal of 4.5? And after I get the reciprocal how did they get 2 over 9 for the answer?
djverab [1.8K]
So 4.5 is equal to 4 and 1/2 
u can convert that to 9/2
then to get the reciprocal you flip the denominator and numerator
this gives u 2/9
3 0
3 years ago
What is the length x of PQ
Bas_tet [7]

Answer:

11.2

Step-by-step explanation:

If the rectangulars are similar then we can use similarity ratio to calculate value of x

CD is similar to RS and AB is similar to QP

4/6.4 = 7/x cross multiply expressions

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6 0
3 years ago
Find the area of the trapezoid.
Vadim26 [7]
Area of the trapezium = 1/2(18 + 6) x 12
Area of the trapezium = 144 in²

------------------------------------------------
Answer: Area = 144 in²
------------------------------------------------
4 0
3 years ago
Read 2 more answers
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