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3 years ago

12

A retired couple invested $8000 in bonds at a simple interest rate of 8%. At the end of one year, how much interest did they rec

eive on their investment?

1 answer:

babunello [35]3 years ago

7 0

They received $640.

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A theater has 56 rows of seats. If there are 13 seats in the first row, 18 in the 2nd row, 23 in the 3rd row. How many seats are

Anna35 [415]

Answer:

8428

Step-by-step explanation:

According to the Question,

Given, A theater has 56 rows of seats. If there are 13 seats in the first row, 18 in the 2nd row, 23 in the 3rd row.

We have a number sequence 13, 18, 23, ...

We can say that this is an arithmetic sequence because of the common difference 'd', is equal to 5, and the first term 'a1' is equal to 13.

The formula for the sum of an arithmetic sequence with n terms is given is $S_n= \frac{n}{2} [2a_1+(n-1)d]S$ .

Substitute the given values into the equation to solve for the sum of the 56 rows of seats.

$S_56= \frac{56}{2}[2(13)+(56-1)(5)]\\S_{56}=28\left[26+275\right]\\S_{56}=28\left[301\right]\\S_{56}=8428$

Therefore, there are 8428 seats in all.

4 0

3 years ago

Use the fundamental counting principle to determine all the possible outcomes from rolling a die once then spinning the spinner.

Rudik [331]

The answer is there are 6 possible outcomes: {1, 2, 3, 4, 5, 6} Hope this helps!

6 0

3 years ago

What is the answer a b or c

olganol [36]

I think it's B I might be wrong I hope it helped

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3 years ago

Which expression has value of 15 when = 12?

frosja888 [35]

Answer:

I think its 3p not sure but u can try that

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3 years ago

I HAVE 2 MIN PLS HELP

Maksim231197 [3]

Answer:

C (ignore this it asked for 20 characters)

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3 years ago