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enyata [817]
2 years ago
11

By what percent did the area change 40 to70

Mathematics
1 answer:
Alexxx [7]2 years ago
4 0

Answer:

75%

Step-by-step explanation:

A change from 40 to 70 represents a positive change (increase) of 75%

Percent change = 70 - 40

|40|

x 100 = 30

40

x 100 = 75 % (increase)

Where: 40 is the old value and 70 is the new value. In this case we have a positive change (increase) of 75 percent because the new value is greater than the old value.

You might be interested in
. If IQ scores are normally distributed with a mean of 100 and a standard deviation of 5, what is the probability that a person
bulgar [2K]

Answer:

2.28% probability that a person selected at random will have an IQ of 110 or greater

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 100, \sigma = 5

What is the probability that a person selected at random will have an IQ of 110 or greater?

This is 1 subtracted by the pvalue of Z when X = 110. So

Z = \frac{X - \mu}{\sigma}

Z = \frac{110 - 100}{5}

Z = 2

Z = 2 has a pvalue of 0.9772

1 - 0.9772 = 0.0228

2.28% probability that a person selected at random will have an IQ of 110 or greater

5 0
3 years ago
Someone please help thanks!<3
love history [14]

Answer:

y = -5x + 4/3

Step-by-step explanation:

m is the slope and b is the y intercept. m= -5 so -5 is the slope and b= 4/3 so 4/3 is the y intercept.

6 0
2 years ago
find the column which has products that are the sum of the yellow shaded numbers in each row Shaded the column what pattern do y
BaLLatris [955]

Answer:

They are even numbers (divisible by two)

Step-by-step explanation:

The number column starts from 2 and is incremented by two for every number in the column. The remainder of the division of each number in the sequence is zero and the result of the division is sequence 1,2,3,4,5,6,7...

Therefore, the numbers in the column are even numbers.

6 0
3 years ago
Please help. Will mark Brainliest to whoever gets it right! :)
levacccp [35]

Answer:

A's average speed is 100. I did this same thing and passed my grade.

6 0
2 years ago
Read 2 more answers
I don’t know how to do this math problem
Svetach [21]

Answer:

I'll help

Step-by-step explanation:

No worries man

3 0
3 years ago
Read 2 more answers
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