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lesantik [10]
3 years ago
5

Can I please have help with numbers 28 and 30 and can you check if I got number 29 correct? THANK YOU

Mathematics
1 answer:
sweet [91]3 years ago
6 0
28 is B 
30 is C and 
29 is correct as it is!
Hope this helps.
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The formula for the future value V (in dollars) of an investment earning simple interest is V=p+prt, where p (in dollars) is the
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Answer:

A. p=\dfrac{V}{1+rt}

B. $2,307.69

Step-by-step explanation:

You are given the formula

V=p+prt,

where V = investment earning simple interest

p = principal,

r = interest rate

t = time

So,

A. V=p(1+rt)\\ \\p=\dfrac{V}{1+rt}

B. r = 0.06 (or 6% as percent)

V = $3,000

t =5

so,

3,000=p+p\cdot 0.06\cdot 5\\ \\3,000=p+0.3p\\ \\1.3p=3,000\\ \\p=\dfrac{3,000}{1.3}\approx 2,307.69

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the area of a square whose sides have length x cm is increasing at the rate of 12cm²/s. how fast is the length of a side increas
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Answer:

0.67 cm/s

Step-by-step explanation:

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Differentiating equation (1) wrt t.

\dfrac{dA}{dt}=2x\times \dfrac{dx}{dt}

When A = 81cm²​, the side of the square, x = 9 cm

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12=2\times 9\times \dfrac{dx}{dt}\\\\\dfrac{dx}{dt}=\dfrac{2}{3}\\\\\dfrac{dx}{dt}=0.67\ cm/s

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The mean is 0.0118 approximately. So option C is correct

<h3><u>Solution:</u></h3>

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\text { The probability of winning a lottery }=\frac{1}{77076}

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\text { Then, binomial mean }=n \times p

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