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3 years ago

7

Suppose you are making a model where one block represents 5 feet. About how many blocks tall is your model of the Empire State B

uilding? What is the scale factor?

1 answer:

Ymorist [56]3 years ago

3 0

Answer:
250 blocks

Scale factor:

Explanation:
1,250/5=250

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GIVING BRAINLIEST Write a proportion that could be used to solve for each variable. Then solve. 16 walls in 40 hours 3 walls in

soldi70 [24.7K]

The proportion that could be used to solve for the variable is $\frac{16}{40}=\frac{3}{h}$ ; h = 7.5 ⇒ answer b

Step-by-step explanation:

A proportional relationship: one variable is always a constant value times the other, that constant is called the constant of proportionality

y = k x is the equation of the proportional relationship
We can write the proportional relationship in the form $\frac{y_{1}}{x_{1}}=\frac{y_{2}}{x_{2}}=k$

The number of walls and the number of hours are increased or decreased together

∴ The number of walls and the number of hours are proportion

∵ 16 walls in 40 hours

∵ 3 walls in h hours

- By using the second rule above

∴ $\frac{16}{40}=\frac{3}{h}$

The proportion that could be used to solve for the variable is $\frac{16}{40}=\frac{3}{h}$

Let us solve it to find h

∵ $\frac{16}{40}=\frac{3}{h}$

- By using cross multiplication

∴ 16 × h = 3 × 40

∴ 16 h = 120

- Divide both sides by 16

∴ h = 7.5

The value of h is 7.5 hours

Learn more:

You can learn more about the proportion in brainly.com/question/10708697

#LearnwithBrainly

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3 years ago

It is believed that 3% of people actually have this predisposition. The genetic test is 99% accurate if a person actually has th

fiasKO [112]

Answer:

Required Probability = 0.605

Step-by-step explanation:

Let Probability of people actually having predisposition, P(PD) = 0.03

Probability of people not having predisposition, P(PD') = 1 - 0.03 = 0.97

Let PR = event that result are positive

Probability that the test is positive when a person actually has the predisposition, P(PR/PD) = 0.99

Probability that the test is positive when a person actually does not have the predisposition, P(PR/PD') = 1 - 0.98 = 0.02

So, probability that a randomly selected person who tests positive for the predisposition by the test actually has the predisposition = P(PD/PR)

Using Bayes' Theorem to calculate above probability;

P(PD/PR) = $\frac{P(PD)*P(PR/PD)}{P(PD)*P(PR/PD)+P(PD')*P(PR/PD')}$

= $\frac{0.03*0.99}{0.03*0.99+0.97*0.02}$ = $\frac{0.0297}{0.0491}$ = 0.605 .

7 0

3 years ago

A certain one-day seminar consisted of a morning session and an afternoon session. If each of the 128 people attending the semin

Afina-wow [57]

Answer:

16 people (1/8) attended the morning session only

Step-by-step explanation:

If everyone attended something, the 1/8 of the people who didn't attend an afternoon session must have attended only the morning session.

1/8 of the 128 people = 16 people attended only the morning session

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4 years ago

A coat originally sold for $180. If a store is offering 2 successive discounts of 30% and 10% respectively, how much would the c

MatroZZZ [7]

Answer:

$113.4

Step-by-step explanation:

Formula for finding the selling price after two successive discounts is given below:

$Selling \: Price = x - (y + z - \frac{yz}{100} \%) \times x \\ \\ where \: x = \$180 \\ y = 30 \% \: \: and \: z = 10\% \\ \\ plugging \: the \: values \: of \: x \: y \: and \: z \:\\ in \: the \: above \: formula \: we \: find: \\ \\ Selling \: Price \\= 180 - (30 \% +1 0 \% - \frac{30 \times 10}{100}\% ) \times 180 \\ \\ = 180 - (40 \% - 3\% ) \times 180\\ \\ = 180 - 37\% \times 180\\ \\ = 180 - 0.37 \times 180\\ \\ = 180 - 66.6 \\ \\ \purple {\bold{\boxed{ Selling \: Price = \$113.4}}}$

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3 years ago

The tax rate is 3.9%. What is the tax on $42?

grigory [225]

Answer:

$43.64

Step-by-step explanation:

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4 years ago

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