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VLD [36.1K]
2 years ago
13

Karl and Mark are walking through the woods dropping breadcrumbs to help them find their way home. After ten minutes, their brea

dbasket has 120 crumbs left. After thirteen minutes, the basket has 96 crumbs left. What is the rate of change (breadcrumbs per minute)?
Mathematics
1 answer:
givi [52]2 years ago
5 0

Answer:

-8

Step-by-step explanation

\frac{96-120}{13-10} = -8

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Karla invests $300 compounded every 6 months at a rate of 10% for 3 years. At the end of three years, Karla will have $402.03 in
adell [148]

Answer:

Step-by-step explanation:

We would apply the formula for determining compound interest which is expressed as

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

Where

A = total amount in the account at the end of t years

r represents the interest rate.

n represents the periodic interval at which it was compounded.

P represents the principal or initial amount deposited

From the information given,

P = $300

r = 10% = 10/100 = 0.1

n = 2 because it was compounded 2 times in a year(6 months).

t = 3 years

Therefore,

A = 300(1 + 0.1/2)^2 × 3

A = 300(1 + 0.05)^6

A = 300(1.05)^6

A = $402.03

4 0
3 years ago
Cuál es el valor que tiene x
salantis [7]

Answer:

I might be wrong double check but it's something like

Step-by-step explanation:

4x/3-40/3

(not to sure on that so don't be mad if it's wrong)

6 0
3 years ago
Use the given information to find the minimum sample size required to estimate an unknown population mean μ.
larisa86 [58]

Answer:

The number of business students that must be randomly selected to estimate the mean monthly earnings of business students at one college is 64.

Step-by-step explanation:

The (1 - <em>α</em>) % confidence interval for population mean is:

 CI=\bar x\pm z_{\alpha/2}\ \frac{\sigma}{\sqrt{n}}

The margin of error for this interval is:

 MOE= z_{\alpha/2}\ \frac{\sigma}{\sqrt{n}}

The information provided is:

<em>σ</em> = $569

MOE = $140

Confidence level = 95%

<em>α</em> = 5%

Compute the critical value of <em>z</em> for <em>α</em> = 5% as follows:

 z_{\alpha/2}=z_{0.05/2}=z_{0.025}=1.96

*Use a <em>z</em>-table.

Compute the sample size required as follows:

MOE= z_{\alpha/2}\ \frac{\sigma}{\sqrt{n}}  

       n=[\frac{z_{\alpha/2}\times \sigma}{MOE}]^{2}

          =[\frac{1.96\times 569}{140}]^{2}\\\\=63.457156\\\\\approx 64

Thus, the number of business students that must be randomly selected to estimate the mean monthly earnings of business students at one college is 64.

4 0
3 years ago
Can someone help me asap please
lutik1710 [3]

Answer:

The answer is $19.44

Step-by-step explanation:

First you have to find 25% of $28.80 (which is 7.20). Then, you subtract the $7.20 from your 28.80. You do that because you are getting a 25% discount. Then, you find 10% of $21.60 (your answer for the 25% discount) and you subtract 10% of $21.60. After that, you get your total of $19.44.

I hope you find this helpful.

8 0
3 years ago
Which expression is equivalent to<br> 3V64k^12
scoundrel [369]

Answer:

I think the answer is C

Step-by-step explanation:

4 0
3 years ago
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