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Arisa [49]
3 years ago
15

sandy has $200 in her bank account. if she writes 6 checks for exactly $19.98, what expression describes the change in her bank

account
Mathematics
2 answers:
kkurt [141]3 years ago
7 0
6x+19.98=200
200-19.98=6x
X= 200-19.98/6
= solve for it.
Phantasy [73]3 years ago
5 0
The answer is 80.12 if you do 19.98 x 6 its 119.88 then do 200-119.88

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There are 169 million registered voters in the us. determine an interval for the number (how many) of registered democrats in th
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Part A:

Given that in a sample of 400 registered voters, 204 were democrats, i.e. n = 400, <span>\hat{p}= \frac{204}{400} =0.51

</span>The 95% confidence interval for the proportion of registered democrats voters in the population is given by:

95\%\ C.I.=\hat{p}\pm z_{\alpha/2}\sqrt{\frac{\hat{p}(1-\hat{p})}{n}} \\  \\ =0.51\pm1.96\sqrt{\frac{0.51(1-0.51)}{400}}=0.51\pm1.96\sqrt{\frac{0.2499}{400}} \\  \\ =0.51\pm1.96(0.025)=0.51\pm0.049=(0.51-0.049,\ 0.51+0.049) \\  \\ =\bold{(0.461,\ 0.559)}



Part B:

Given that t<span>here are 169 million registered voters in the US, the interval for the number of registered democrats in the population is given by

[0.461(169,000,000), 0.559(169,000,000)] = (77,909,000, 94,471,000)
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3 years ago
Sam ran 63,756 feet in 70 minutes. What is sam’s rate in mile per hour
Stella [2.4K]

Answer:

10 miles per hour

Step-by-step explanation:

there are 60 minutes in an hour once you covert you have that it took 1.17 hours then there are 5280 feet in a mile so you convert and get 12.075 miles

you divide

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then you simplify to the nearest whole number and get 10  

3 0
4 years ago
This needs to be simplified and clearly i don’t know the answer <br><br> -23b^4+(-7b^4)
vladimir2022 [97]

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5 0
3 years ago
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What are the numbers of pi
gizmo_the_mogwai [7]

Answer: 3.14

Step-by-step explanation: it goes on forever but that is what most people use to calculate with

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3 years ago
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Jaina and Tomas compare their compound interest accounts to see how much they will have in the accounts after three years. They
MariettaO [177]

The question is incomplete. The complete question is :

Jaina and Tomas compare their compound interest accounts to see how much they will have in the accounts after three years. They substitute their values shown below into the compound interest formula. Compound Interest Accounts Name Principal Interest Rate Number of Years Compounded Jaina $300 7% 3 Once a year Tomas $400 4% 3 Once a year. Which pair of equations would correctly calculate their compound interests?

Solution :

It is given that Jaina and Tomas wants to open an account by depositing a principal amount for a period of 3 years and wanted to calculate the amount they will have using the compound interest formula.

<u>So for Jiana</u> :

Principal, P = $300

Rate of interest, r = 7%

Time, t = 3

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Therefore, using compound interest formula, we get

$A=P\left(1+\frac{r}{100}\right)^{t}$

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<u>Now for Tomas </u>:

Principal, P = $400

Rate of interest, r = 4%

Time, t = 3

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Therefore, using compound interest formula, we get

$A=P\left(1+\frac{r}{100}\right)^{t}$

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Therefore, the pair of equations that would correctly calculate the compound interests for Jaina is $A=300(1+0.07)^3$ .

And the pair of equations that would correctly calculate the compound interests for Tomas is $A=400(1+0.04)^3$ .

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3 years ago
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