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3 years ago

A scale drawing of a car uses a scale of 2cm =1m. What is the length of the car on the drawing if the actual car measures 4 m?

Mathematics

2 answers:

Oduvanchick [21]3 years ago

5 0

Simply divide 4m by the given scale length of 1m
4/1 = 4

now multiply that by 2cm
4*2 = 8

$8cm$

marusya05 [52]3 years ago

3 0

Answer:

The answer is 8cm.

Step-by-step explanation:

The scale drawing uses a ratio of 2cm:1m. If the actual car is 4 meters long, you would multiply 2 by 4 to get 8cm. The actual new ratio on the map is 8cm:4m, which is equivalent to the one in the problem.

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kati45 [8]

I'm pretty sure that the answer is A., because if you turn the fraction into a decimal and multiply it by 24, you get 7.999992, which estimates to be 8.

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3 years ago

Left-handedness occurs in about 12% of all Americans. Males are slightly more likely than females to be left-handed, with 13% of

FinnZ [79.3K]

Answer:

a)Both X and Y can be well approximated by normal random variables.

Step-by-step explanation:

For each individual, there are only two possible outcomes. Either they are right-handed, or they are left-handed. This means that we can solve this problem using concepts of the binomial probability distribution.

Binomial probability:

Probability of exactly x sucesses on n repeated trials, with probability p.

The binomial probability can be well approximated by normal random variables, using the expected value $E(X) = np$ and the standard deviation $\sigma = \sqrt{np(1-p)}$

Let X be the number of males (out of the 100) who are left-handed.

$n = 100$ and $p = 0.13$ . Can be well approximated.

Let Y be the number of females (out of the 80) who are left-handed.

$n = 80$ and $p = 0.11$ . Can be well approximated.

The correct answer is

a)Both X and Y can be well approximated by normal random variables.

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3 years ago

865 divided into 2330 to the nearest percent

dmitriy555 [2]

Answer:

269%

Step-by-step explanation:

2330

---------- = 2.69 => 269%. (Mult. the number 2.69 by 100% to obtain this)

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3 years ago

Read 2 more answers

a student either knows the answer or guesses. Let 3434 be the probability that he knows the answer and 1414 be the probability t

Arlecino [84]

Answer: $\dfrac{12}{13}$

Step-by-step explanation:

Let A = he known the answer then A' = he guess the answer.

B = he answered it correctly

As per given , we have

$P(A)=\dfrac{3}{4}\ \ ,\ \ P(A')=\dfrac{1}{4}$

$P(B|A)=1$

$P(B|A')=\dfrac{1}{4}$

By Bayes theorem , we have

$P(A|B)=\dfrac{P(B|A)P(A)}{P(B|A)P(A)+P(B|A')P(A')}\\\\ P(A|B)=\dfrac{1\times\dfrac{3}{4}}{1\times\dfrac{3}{4}+\dfrac{1}{4}\times\dfrac{1}{4}}\\\\= \dfrac{12}{13}$

The probability that the student knows the answer given that he answered it correctly is $\dfrac{12}{13}$ .

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2 years ago

A bicycle has a listed price of $660.95 before tax. If the sales tax rate is 7.25%, find the total cost of the bicycle with sale

skelet666 [1.2K]

9514 1404 393

Answer:

$708.87

Step-by-step explanation:

The price with tax included is ...

660.95 + 0.0725×660.95 = 660.95(1 +0.0725) = 708.87

The total cost of the bicycle with tax is $708.87.

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2 years ago

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