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kirill115 [55]
3 years ago
15

Problem 3 A bank charges a service fee of $7.50 per month for a checking account. A bank account has $85.00. If no money is depo

sited or withdrawn except the service charge, how many months until the account balance is negative
Mathematics
1 answer:
omeli [17]3 years ago
8 0

Answer:

12 months

Step-by-step explanation:

85-7.50x

At 11 months, the charges will add up to $82.50, so you know what after 12 months the account will be in the negative. At 12 months, the charges will be at $90, which means the account will have a balance of -$5

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Find 4.5×10^7 over 1.5×10^-8 . write answer in scientific notation.
Sati [7]

Answer:

\large\boxed{\dfrac{4.5\times10^7}{1.5\times10^{-8}}=3\times10^{15}}

Step-by-step explanation:

The scientific notation:

a\times10^k\ \text{where}\ 1\leq a

We have:

\dfrac{4.5\times10^7}{1.5\times10^{-8}}=\dfrac{4.5}{1.5}\times\dfrac{10^7}{10^{-8}}

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3 years ago
Assume women’s heights are normally distributed with a mean of 63.6 inches and a standard deviation of 2.5 inches. a. If one wom
Zarrin [17]

Answer:  a)  0.5636       b) 0.7881

Step-by-step explanation:

We assume that women’s heights are normally distributed .

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a) Formula for z:-

z=\dfrac{x-\mu}{\sigma}

Put x= 64, we get

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Hence, the probability that her height is less than 64 inches = 0.5636

b. Sample size : n= 25

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Hence, the probability that they have a mean height less than 64 inches. =0.7881

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Answer:

Hold on a minute, gotta let my brain wake up.

Step-by-step explanation:

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