2 years ago

HURRY! (NO LINKS PLEASE)

Mathematics

1 answer:

steposvetlana [31]2 years ago

5 0

Can u answer my resent post pls

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Ben takes out a personal loan of £1200 with a simple interest rate of 20% for a term of 3 years how much is the total cost of th

lilavasa [31]

Answer:

$1920

Step-by-step explanation:

Original amount: £1200 x Simple interest rate: 0.2 x number of years: 3 = 720

Add Original onto simple interest

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2 years ago

A limnologist wishes to estimate the mean phosphate content per unit volume of lake water. It is knownfrom studies in previous y

telo118 [61]

Answer: 68

Step-by-step explanation:

As per given , we have

Population standard deviation : $\sigma=4$

Critical value for 90% confidence interval = $z_{\alpha/2}=1.645$

Margin of error : E= 0.8 milligrams

The formula to find the sample size is given by :-

$n=(\dfrac{z_{\alpha/2}\ \sigma}{E})^2$

i.e. $n=(\dfrac{(1.645)(4)}{0.8})^2=(8.225)^2$

$=67.650625\approx68$

Hence, the limnologist must analyze 68 samples.

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3 years ago

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cricket20 [7]

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3 years ago

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