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Mila [183]
2 years ago
5

a formula that can be determined A, the amount in an account that earns simple interest, where P is the principal, r is the annu

al interest rate expressed as a decimal, and t is the time in years since the principal was deposited in the account
Mathematics
1 answer:
Sergio039 [100]2 years ago
8 0

Answer:

A = P(1 + rt)

Step-by-step explanation:

The principal of the amount P is deposited in an account that earns simple interest.

The interest that the account earns is r annual interest rate expressed as a decimal.

The principal P is invested for t years.

Therefore, the matured amount A will be given by  

A = P(1 + rt)

Hence, this is the formula that can calculate the A if P, r and t are known. (Answer)

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Miley made coupon books for a fundraiser. On the first day, she made 1/6 of the total number of coupon books she made for the fu
Zina [86]

Answer:


Step-by-step explanation:

Let x be the number of books she made in total

On  first day she made 1/6 x books

On second day she made 48 books.

The number of books she made on second day is 1/5 more than she made on first day so - so she made  48 / 6/5 = 40 on first day








6 0
2 years ago
Read 2 more answers
Karen and Maria each open a savings account at the same time. They only make deposits into their accounts and do not make withdr
lina2011 [118]

The amount in Maria's account is $79.

The amount in Karen's account is $73.

<u>Step-by-step explanation:</u>

Karen deposits $28 into her account and she deposits $5 each week into her account.

From this given information, the equation can be framed as y = 28+5x ----(1)

where,

  • y is the total amount deposited.
  • x is the number of weeks the particular amount is deposited.

The equation for Maria's account is given as y = 7+8x ------(2)

<u>To find the no.of weeks at which they both have same amount of money :</u>

Equating the equations (1) and (2),

⇒ 28 + 5x = 7 + 8x

⇒ 28-7 = 8x-5x

⇒ 21 = 3x

⇒ x = 21/3

⇒ x = 7 weeks

After 7 weeks, the money in the account of Karen & Maria will be same.

<u>To find the amount of money in each girl's account after 2 weeks :</u>

It is given that, you have to calculate amount of money that each girl has in her account 2 weeks after they have the same amount of money in their accounts.

We already know that, it takes 7 weeks for them to have same amount.

So, 7 weeks + 2 weeks = 9 weeks

You have to calculate the amount in each girl's account after 9 weeks.

<u>Karen's account :</u>

Substitute x=9 in eq(1),

⇒ y = 28+5(9)

⇒ y = 28+45

⇒ y = 73

The amount in Karen's account is $73.

<u>Maria's account :</u>

Substitute x=9 in eq(1),

⇒ y = 7+8(9)

⇒ y = 7+72

⇒ y = 79

The amount in Maria's account is $79.

4 0
3 years ago
Find the width of rectangle if its area is (3x2 + 9xy + 6y2) square centimeters.
marin [14]
I hope this helps you

5 0
2 years ago
The number of boys exceeded the number of girls by seven. There were 29 boys and girls. How many of each were there?
Elenna [48]

Answer:

Girls: 11

Boys: 18

Step-by-step explanation:

x: number of girls

x+x+7=29

2x=22

x=11

number of guys:

x+7=11+7=18

4 0
2 years ago
Eric is planning to paint the four pillars that are attached to the front of his house. But, he needs to know how many square fe
mariarad [96]
Assume that the pillars are cylindrical..you're looking for the lateral surface area correct? to get the lateral surface area, you use the formula LSA = 2rh(pi) where r is radius h is height substitute the values... h = 10 d = 1 so r =1/2 so LSA = 2 (1/2)(10)(3.14) LSA = 10(3.14) LSA = 31.4 sq ft :D                                      Can You Mark Me Brainlest Plz...
6 0
2 years ago
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