3 years ago

Please help number 6 need it for hw

Mathematics

1 answer:

aalyn [17]3 years ago

7 0

This is the graph for the problem

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Solnce55 [7]

Answer:

Step-by-step explanation:

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Please can someone help me solve the question in the picture 10 points plus brainliest!!!

Effectus [21]

Answer:

E. 2 1/2

E. 8.5 cm

C. 6 cm

Step-by-step explanation:

4............................

Scale factor = AE/AC = (4+6)/4 = 10/4 = 2.5

Correct option is E. 2 1/2

5............................

DE = ?

DE = √AD² - AE² = √15² - 10² = √125 = 5√3 ≈ 8.66

For measure of AD see next question (6)

Close option is E. 8.5 cm

6............................

AB = ?

AD/AB = 2.5 the scale factor as per question 4
(AB + 9)/AB = 2.5
2.5*AB = AB + 9
1.5*AB = 9
AB = 9/1.5
AB = 6 cm

Correct option C. 6 cm

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3 years ago

Round 0.42 to the nearst tenth

Archy [21]

0.4 because if it’s five or more, add one more. If it’s four or less, let it rest.

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3 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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Paula puts an initial $600 into a savings account. The account has a 7% annual compound interest rate. Find the amount of money

Alexxandr [17]

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