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Drupady [299]
3 years ago
8

If the numbers below were ordered from least to greatest, which number could you use to replace the blank? 0.20,2/5 □ , 3/4,8/10

Mathematics
1 answer:
faust18 [17]3 years ago
8 0
1/2 would work for the blank space

because as shown in the image you could relate it to a whole for each one and put it to 100 to figure out what the blank could be

the 0.20 can be converted to 1/5 so that way you can put everything into the 100 group

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I dont really understand this
galina1969 [7]

Answer:

1. a^-b

2.a^b/a^c

3.a^c/b^c

4 0
2 years ago
Two college roommates have each committed to donating to charity each week for the next year. The roommates’ weekly incomes are
schepotkina [342]

Answer:

C. 5 weeks.

Step-by-step explanation:

In this question we have a random variable that is equal to the sum of two normal-distributed random variables.

If we have two random variables X and Y, both normally distributed, the sum will have this properties:

S=X+Y\\\\\ \mu_S=\mu_X+\mu_Y=30+60=90\\\\\sigma_S=\sqrt{\sigma_X^2+\sigma_Y^2}=\sqrt{10^2+20^2}=\sqrt{100+400}=\sqrt{500}=22.36

To calculate the expected weeks that the donation exceeds $120, first we can calculate the probability of S>120:

z=\frac{S-\mu_S}{\sigma_S} =\frac{120-90}{22.36}=\frac{30}{22.36}=1.34\\\\P(S>120)=P(z>1.34)=0.09012

The expected weeks can be calculated as the product of the number of weeks in the year (52) and this probability:

E=\#weeks*P(S>120)=52*0.09012=4.68

The nearest answer is C. 5 weeks.

6 0
2 years ago
I have a test In math Tommorow and its a make or break situation for my grade I really need help with this question!
irina [24]
I was just in the same situation, you got this. the answer is A.
8 0
3 years ago
Read 2 more answers
Ponzi saves dimes and quarters. She has 12 coins adding up to $1.80. How many dimes does she have?
myrzilka [38]
4 quarters and 8 dimes
4 0
2 years ago
a tree casts a shadow that is 20 ft long. the angle of elevation of the sun is 29°. how tall is the tree?
mars1129 [50]
You can use the trig ratios. Draw a diagram to see which one is appropriate. 
Tan would be used.
Tan29=x/20
20Tan29=x
Put this into your calculator and see what you get
3 0
2 years ago
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