02/04/23
A metallurgist has one alloy containing 43% aluminum and another containing 63% aluminum. How many pounds of each alloy must he use to make 43 pounds of a third alloy containing 49% aluminum?
A metallurgist has one alloy containing 43% aluminum and another containing 63% aluminum. How many pounds of each alloy must he use to make 43 pounds of a third alloy containing 49% aluminum?
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02/04/23
invested and interest
$13,138 is invested, part at 9% and the rest at 7% If the interest earned from the amount invested at 9% exceeds the interest earned from the amount invested at 7% by $537.46, how much is invested...
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02/03/23
Probability of simple events and opposite events
You spin the spinner once.2345678What is P(less than 7)?Write your answer as a percentage rounded to the nearest tenth.
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02/03/23
For a standard normal distribution, find:
P(z < c) = 0.7522Find c rounded to two decimal places.
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02/03/23
Question on Probability
Suppose Erroll will pass his statistics test with probability 0.7, pass his fluid mechanics test with probability 0.5, and pass both with probability 0.37. What is the probability that Erroll will...
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