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qwelly [4]
3 years ago
11

Liz deposited money into an account in which interest is compounded quarterly at a rate of 3.2%. How much did she deposit if the

total amount in her account after 5 years was $4837.65, and she made no other deposits or withdraws. SHOW WORK
You invest $5125 into a fund that is expected to earn 4.75% per year. How long will it take the fund to be worth $10,250. round to the tenths SHOW WORK

Beth's insurance company pays for 75% of the cost of her MRI, after she pays a $100 deductible. How much will Beth pay for her MRI if it costs $1218. SHOW WORK
Mathematics
1 answer:
Anna [14]3 years ago
5 0

Answer:

$4125.00

14.94 years

$379.50

Step-by-step explanation:

1. A = P(1 + r/n)^(nt)

4837.65 = P(1 + 0.032/4)^(4×5)

4837.65 = P(1.008)^(20)

P = 4125.00

2. A = P(1 + r/n)^(nt)

10250 = 5125(1 + 0.0475/1)^(1×t)

10250 = 5125(1.0475)^t

2 = 1.0475^t

ln 2 = t ln 1.0475

t = 14.94

3. Beth pays the first $100, bringing the cost to $1118.  She then pays 25% of this, which is $279.50.  So she pays a total of $379.50.

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In 2017, there were about 21 million teenagers (aged 13-17) in the United States. They each
vivado [14]

The Number of text messages sent in a month is 1.68 × 10^{(-8)}

Step-by-step explanation:

Step 1 :

Total number of teenagers in United States = 21 million

Average text messages sent per month = 800

We need to find the number of text messages sent each month

Step 2 :

The number of text messages in a month can be computed by taking the product of the total number of teenagers and average messages sent per month

Therefore

Number of text messages that is sent in a month = 21 million ×  800

                                                                      = 21 × 10^{6} × 800

                                                                     = 168  × 10^{6} = 1.68 × 10^{(-8)}

Step 3 :

Answer :

The Number of text messages that is sent in a month is 1.68 × 10^{(-8)}

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3 years ago
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Step-by-step explanation:

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