3 years ago

The math department is putting together an order for new calculators. The

Mathematics

2 answers:

lara [203]3 years ago

8 0

Answer:

Step-by-step explanation:

A P # X

alexgriva [62]3 years ago

5 0

Answer:

Step-by-step explanation:

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Kim namjoon...<br><br> anyone army??

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4 years ago

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A diver is 18 feet below sea level. Another diver is 48 feet below sea level. What is the distance between the two divers?

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3 years ago

2. Mr. Nelson bought a car for $20,000 with a 5% interest rate.

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4 years ago

You need a 65% alcohol solution. On hand, you have a 50 mL of a 30% alcohol mixture. You also have 70% alcohol mixture. How much

DIA [1.3K]

Answer:

350 mL

Step-by-step explanation:

Let q represent the quantity (in mL) needed of the 70% solution. Then the total amount of mixture will be q+50 milliliters. The total amount of alcohol in the mixture will be ...

0.70q +0.30(50) = 0.65(50 +q)

.05q = 17.5 . . . . . . subtract (0.65q +1.50)

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You will need 350 mL of the 70% solution.

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3 years ago

Daniel wanted to know his approximate score on the final exam for his mathematics class. His professor hinted that his score was

hammer [34]

Answer: The raw score for Daniel's exam grade is 101.69.

Step-by-step explanation:

For x be any random variable.

Formula for z-score :

$z=\dfrac{x-\mu}{\sigma}$ , where $\mu$ = population mean

$\sigma$ = population standard deviation.

Let x be the raw score for Daniel's exam grade.

As per given , we have

$\mu=90$ , $\sigma=7$ and z= 1.67 , put these values in the above formula , we get

$1.67=\dfrac{x-90}{7}\\\\\Rightarrow\ x-90=7(1.67)=11.69\\\\\Righarrow\ x=11.69+90=101.69$

Hence, the raw score for Daniel's exam grade is 101.69.

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3 years ago