Help please guys thanks

Mathematics

1 answer:

STALIN [3.7K]3 years ago

7 0

We know that $a^{m/n}=\sqrt[n]{a^m}$ ,

so in your case,

$(-8)^{2/3}=\sqrt[3]{(-8)^2}=\sqrt[3]{64}=\boxed{4}$

Hope this helps :)

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Margaret [11]

The expected duration of the activity is 29 days and 4 hours.

Step-by-step explanation:

Step 1:

The optimistic time, $t_{o}$ = 25 days,

The most likely estimate, $t_{m}$ = 29 days.

The pessimistic time, $t_{p}$ = 34 days.

According to PERT, the expected duration of the activity, $t_{e} = \frac{t_{0}+4t_{m} +t_{p} }{6}.$

Step 2:

By substituting the given values, we get $t_{e} = \frac{t_{0}+4t_{m} +t_{p} }{6} = t_{e} = \frac{25+4(29) +34 }{6} = \frac{175}{6} = 29.1666.$

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4 years ago

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Mila [183]

Question:
Mrs. Magdalino kept records on how much she spent on gasoline and the maintenance of her car. She found that it cost $485 to drive 500 mi in a month.
a) Find the cost per mile. Write an equation that relates the cost c for gasoline and maintenance of a car to the number of miles m the car is driven.
b) Use the equation to find the cost for driving 1200 miles.
c) About how many miles are driven for a cost of $820?

Answer:
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b)
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c)
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Step-by-step explanation: