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ella [17]
2 years ago
15

In Ivy's neighborhood, 40% of the homes have a swimming pool. If there are 80 homes , how many have a pool

Mathematics
1 answer:
prohojiy [21]2 years ago
6 0

Answer:

32 houses will have a pool

Step-by-step explanation:

40% of 80 is 32

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The length of a phone conversation is normally distributed with a mean of 4 minutes and a standard deviation of .6 minutes. What
Ivanshal [37]

Answer:

0.04746

Step-by-step explanation:

To answer this one needs to find the area under the standard normal curve to the left of 5 minutes when the mean is 4 minutes and the std. dev. is 0.6 minutes.  Either use a table of z-scores or a calculator with probability distribution functions.

In this case I will use my old Texas Instruments TI-83 calculator.  I select the normalcdf( function and type in the following arguments:  :

normalcdf(-100, 5, 4, 0.6).  The result is 0.952.  This is the area under the curve to the left of x = 5.  But we are interested in finding the probability that a conversation lasts longer than 5 minutes.  To find this, subtract 0.952 from 1.000:   0.048.  This is the area under the curve to the RIGHT of x = 5.

This 0.048 is closest to the first answer choice:  0.04746.

8 0
2 years ago
Alberto conducted an experiment by rolling a fair six-sided number cube 60 times. He rolled a 2 fifteen times. Which statement a
lys-0071 [83]

Answer:

The experimental probability of rolling a 2 is \frac{1}{4}.

Step-by-step explanation:

Since you didn't give any statements, I'll make one myself.

P of rolling a 2 (experimental): \frac{15}{60} =\frac{1}{4}

The experimental probability of rolling a 2 is \frac{1}{4}.

8 0
3 years ago
HELP ASAP GIVING BRAINLIEST!!! There are other questions, feel free to answer.
ozzi

Since we are asked to find the rate of change from Monday to Wednesday, we are dividing by 2, since Monday is day 1 and Wednesday is day 3. 3 - 1 = 2.

1800 + 500 = 2300 calories consumed Tuesday.

2300 - 100 = 2200 calories Wednesday.

(2200 - 1800)/2 = 400/2 = 200 calories  

4 0
2 years ago
Read 2 more answers
The graph of a system of parallel lines will have no solutions. (1 point) Select one: a. Always b. Sometimes c. Never
Andreas93 [3]

Answer:

Always

Step-by-step explanation:

They never intersect

8 0
3 years ago
Read 2 more answers
Point D is the centroid of Triangle ABC. Find CD and CE.<br> DE = 9
sukhopar [10]

Given:

Point D is the centroid of Triangle ABC and DE = 9.

To find:

The measures of CD and CE.

Solution:

We know that, centroid is the intersection of medians and it divides each median in 2:1.

In triangle ABC, CE is a meaning and centroid D divided CE in 2:1. So,

Let the measures of CD and DE are 2x and x respectively.

DE = 9                (Given)

x=9

Now,

CD=2x

CD=2(9)

CD=18

And,

CE=CD+DE

CE=18+9

CE=27

Therefore, the measure of CD is 18 units and the measure of CE is 27 units.

6 0
3 years ago
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