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3 years ago

Herrons formula:2S=a+b+c solve for b

Mathematics

2 answers:

True [87]3 years ago

5 0

Minus a and minus c from both sides

2S-a-c=b
b=2S-a-c

Firlakuza [10]3 years ago

4 0

Answer:

The value of the formula for b is $2S-a-c=b$ .

Step-by-step explanation:

Consider the provided formula.

$2S=a+b+c$

We need to solve the formula for b.

Subtract both sides by a.

$2S-a=a-a+b+c$

$2S-a=b+c$

Subtract both sides by c.

$2S-a-c=b+c-c$

$2S-a-c=b$

Hence, the value of the formula for b is $2S-a-c=b$ .

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3 years ago

how would you change the sentence into a true statement? some irrational numbers are also rational numbers..... A. All irrationa

Fynjy0 [20]

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3 years ago

Read 2 more answers

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2 years ago

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Answer:

width = 1.77845 ft

length = 7.1138 ft

height = 5.691 ft

total cost = $759.09

Step-by-step explanation:

volume = length x width x height

length = 4 width

base of the rectangle = 4 x 1 w = 4w²

72 (volume) = 4w²h

18 = w²h

f(c) = (2 x 4w² x $10) + (2 x wh x $5) + (2 x 4wh x $5)

f(c) = 80w² + 10wh + 40wh

f(c) = 80w² + 50wh

since we need only 1 variable (width), we have to substitute h:

h = 18/w²

f(c) = 80w² + 50w(18/w²) = 80w² + 900/w

f'(c) = 160w + 900/w²

0 = (160w³ + 900)/w²

0 = 160w³ + 900

0 = 20(8w³ + 45)

0 = 8w³ + 45

8w³ = -45

w³ = -45/8

w = ∛-45/8 = -1.77845 and 1.77845

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2 years ago

The 2003 Statistical Abstract of the United States reported the percentage of people years of age and older who smoke. Suppose t

Paul [167]

Complete Question

The 2003 Statistical Abstract of the United States reported the percentage of people 18 years of age and older who smoke. Suppose that a study designed to collect new data on smokers and non smokers uses a preliminary estimate of the proportion who smoke of 0.30.

a. How large a sample should be taken to estimate the proportion of smokers in the population with a margin of error of 0.02? use 95% confidence.

b. Assume that the study uses your sample size recommendation in part (a) and finds 520 smokers. What is the point estimate of the proportion of smokers in the population?

c. What is the 95% confidence interval for the proportion of smokers in the population?

Answer:

$n = 2017$