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irinina [24]
3 years ago
10

on Thursday, 30 students went to after-school tutoring. On Friday, 6 students went. What is the percent decrease in the number o

f students who went to tutoring?
Mathematics
1 answer:
joja [24]3 years ago
4 0
Hey there! :)

The answer is 80%

6 ÷ 30 = 0.2 = 20%

100 - 20 = 80

Hope this helped :)
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There is a 50% chance that the Fed will cut interest rates tomorrow. On any given day, there is a 67% chance the DJIA will incre
Amanda [17]

Answer:

3) 0.72

Step-by-step explanation:

The probability that tomorrow the Fed will cut interest rates (P(F)) OR the DJIA will go up (P(D)), is the sum of each event's individual probability minus their joint probability (Fed cutting interest rates AND the DJIA will going up, P(FD))

P(F+D) = P(F) +P(D) - P(FD)\\P(F+D) = 0.5 + 0.67 - (0.5*0.9)\\P(F+D) = 0.72

The probability that tomorrow the Fed will cut interest rates or the DJIA will go up is 0.72.

5 0
3 years ago
Convert the following decimal or whole number to a percent
vfiekz [6]
You have to move the decimal 2 places over so like if it’s 2.00 the percent would be 200%, and if it was .20 it would be 20%
4 0
3 years ago
Help me with this (I'll give brainly- or what ever its called)
horsena [70]

Answer:

Picture A.

Hope this helps :)

<em>-ilovejiminssi ♡</em>

5 0
3 years ago
If anybody knows the answer to this please help as soon as possible
zheka24 [161]

Answer:

Because we know the height of the mailbox is 4 feet and the length is 6 feet, and we also know that it's located 54 feet from the base of the flagpole, we can use proportions to solve the problem.

\frac{4}{6\\}=  \frac{x}{54}  

Cross-multiply 4 with 54 and 6 with x to result with 216=6x. Divide 6 to both sides to get 36. So, the height of the flagpole would be 36 feet.

8 0
3 years ago
Calculate the mean deviation for the numbers: 75, 83, 96, 100, 121 and 125 A 14.33 B 15 C 15.33 D 16
sveta [45]

Answer:

c) 15.33

Step-by-step explanation:

lets find the mean first

mean = sum of the data values / number of data (n)

= 75 + 83 + 96 + 100 + 121 + 125 / 6

= 600/6

= 100

Next, let 'x' represent each data value and 'a' represent the the mean

now, calculate the deviation from each data point

75 - 100 = - 25

83 - 100 = -17

96 - 100 = - 4

100 - 100 = 0

121 - 100 = 21

125 - 100 = 25

Then, find the absolute value of each deviation and sum them up

that is | a - x |

| -25 | + | -17 | + | -4 | + | 0 | + | 21 | + | 25 |

= 25 + 17 + 4 + 0 + 21 + 25

= 92

now, calculate the mean of the absolute value

92/6 = 15.33

4 0
4 years ago
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