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FromTheMoon [43]
3 years ago
12

72/12 ghhsnjdjdjjdjbdbdbdbdbxb

Mathematics
1 answer:
aliina [53]3 years ago
5 0
72 divided by 12 is 36
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The price of an item has risen to $120 today. Yesterday it was $40. Find the percentage increase.
Snezhnost [94]

Answer:

200%

Step-by-step explanation:

If $40 is 100% then multiply it by 3 to get $120

7 0
2 years ago
Read 2 more answers
The mean time it takes to walk to the bus stop is 8 minutes (with a standard deviation of 2 minutes) and the mean time it takes
11111nata11111 [884]
(a) Average time to get to school
Average time (minutes) = Summation of the two means = mean time to walk to bus stop + mean time for the bust to get to school = 8+20 = 28 minutes

(b) Standard deviation of the whole trip to school
Standard deviation for the whole trip = Sqrt (Summation of variances)

Variance = Standard deviation ^2
Therefore,
Standard deviation for the whole trip = Sqrt (2^2+4^2) = Sqrt (20) = 4.47 minutes

(c) Probability that it will take more than 30 minutes to get to school
P(x>30) = 1-P(x=30)
Z(x=30) = (mean-30)/SD = (28-30)/4.47 ≈ -0.45
Now, P(x=30) = P(Z=-0.45) = 0.3264
Therefore,
P(X>30) = 1-P(X=30) = 1-0.3264 = 0.6736 = 67.36%

With actual average time to walk to the bus stop being 10 minutes;

(d) Average time to get to school
Actual average time to get to school = 10+20 = 30 minutes

(e) Standard deviation to get to school
Actual standard deviation = Previous standard deviation = 4.47 minutes. This is due to the fact that there are no changes with individual standard deviations.

(f) Probability that it will take more than 30 minutes to get to school
Z(x=30) = (mean - 30)/Sd = (30-30)/4.47 = 0/4.47 = 0

From Z table, P(x=30) = 0.5
And therefore, P(x>30) = 1- P(X=30) = 1- P(Z=0.0) = 1-0.5 = 0.5 = 50%
8 0
3 years ago
Which is greater 3/8 or 3/4
hram777 [196]
3\4
because the spaces are bigger draw a model and you will see
4 0
3 years ago
A washer and dryer cost a total of $960. The cost of the washer is three times the cost of the dryer. Find the cost of each item
xeze [42]

Cost of washer: $720

Cost of dryer: $240

I've taken this test before and got it right, so you're good :)

8 0
3 years ago
Which list shows all the factor pairs of 92?
Arte-miy333 [17]

Answer: b

Step-by-step explanation: since i helped can i have brainlist please :D

6 0
2 years ago
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