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3 years ago

14

On a factory floor, 65 out of every 140 toy robots is defective. What percent of the toy robots are defective? Round your answer

to the nearest hundredth.

1 answer:

tester [92]3 years ago

8 0

Answer:

65/140

as a percentage is 46.43

hundredth rounding

46.4

Step-by-step explanation:

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A survey of 2,000 doctor showed that an average of 3 out of 5 doctor use brand x aspirin. How many doctor use brand x asprin

choli [55]

3:5...added = 8

3/8(2000) = 6000/8 = 750 use brand x aspirin <===
5/8(2000) = 10000/8 = 1250 do not use brand x aspirin

4 0

4 years ago

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The lifespan of lions in a particular zoo are normally distributed. The average lion lives 10 years: the standard deviation is 1

frez [133]

Answer:

2.5% probability of a lion living less than 7.2 years

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean = 10

Standard deviation = 1.4

Probability of a lion living less than 7.2 years

The normal distribution is symmetric, which means that 50% of the measures are above the mean and 50% are below.

7.2 = 10 - 2*1.4

So 7.2 is two standard deviations below the mean.

By the empirical rule, of those 50% of the measures below the mean, 95% is within 2 standard deviations of the mean, that is, between 7.2 and 10, and 5% are less than 7.2. So

p = 0.05*0.5 = 0.025

2.5% probability of a lion living less than 7.2 years

4 0

3 years ago

One diagonal of a cube has length 12. Compute the surface area of the cube.

arlik [135]

Answer:

The surface area of the cube is $288\ units^{2}$

Step-by-step explanation:

we know that

The length of a diagonal of a cube is equal to

$D=b\sqrt{3}$

where

b is the length side of a cube

In this problem we have

$D=12\ units$

so

$12=b\sqrt{3}$

solve for b

$b=\frac{12}{\sqrt{3}}\ units$

Simplify

$b=4\sqrt{3}\ units$

<em>Find the surface area of the cube</em>

The surface area of the cube is equal to

$SA=6b^{2}$

substitute the value of b

$SA=6(4\sqrt{3})^{2}=288\ units^{2}$

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3 years ago

Which point below would you use with the point (-2, -5) to get a line with a slope of -1?

nordsb [41]

The point you would use is -6,1

3 0

3 years ago

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Help with thisssssss

Galina-37 [17]

Answer:

She made a mistake in step 3

She simplified the 3^-8 incorrectly

she should've added them

the answer is 3^24 if you need that

Step-by-step explanation:

using the following rule

$b/x^{-n}=bx^n$

we can see that she made a made a mistake in step 3 when simplifying

she should've added 3^8 to 3^16 rather than subtracting them

6 0

3 years ago

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