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3 years ago

The surface area of a cylinder

Mathematics

1 answer:

Kruka [31]3 years ago

8 0

What are you asking, exactly?

To find the surface area of a cylinder, the formula is:
2 $\pi$ rh + 2 $\pi$ $r^{2}$

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What equation is equivalent to 3(a+4)-5(a-2)=22

Ratling [72]

Answer:

the answer would be 234

Step-by-step explanation:

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3 years ago

Please help

Afina-wow [57]

Answer:

Let M represent the amout at any time.

She saves $40 per week so total amount becomes 40x in any specified week.

where x is the number of weeks.

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M = 40x+500

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Step-by-step explanation:

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3 years ago

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3 years ago

The torque required to remove bolts in a steel plate is rated as very high, high, average, and low, and these occur about 30%, 4

Diano4ka-milaya [45]

Answer:

0.004

Step-by-step explanation:

If two events A, B with probabilities P(A), P(B) are independent, then the probability of the two events ocurring at the same time A∩B is P(A)P(B).

In this case we have

P(torque=very high) = 0.3

P(torque=high) = 0.4

P(torque=average) = 0.2

P(torque=low) = 0.01

Using the product rule, we see there are

$\frac{25!}{7!8!6!4!}=4.4172*10^{12}$

ways of partitioning 25 bolts in groups of 7,8,6 and 4 bolts.

Each one of those partitions has a probability of

$(P(torque=very high))^7*(P(torque=high))^8*(P(torque=average))^6*(P(torque=low))^4= (0.3^7)*(0.4^8)*(0.2^6)*(0.1^4)=9.1729*10^{-16}$

So, the probability of rating 7 very high, 8 high, 6 average, and 4 low is

$4.4172*10^{12}*9.1729*10^{-16}=0.004$

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4 years ago