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hichkok12 [17]
3 years ago
9

A box contains seven 40-W bulbs, four 60-W bulbs, and six 75-W bulbs. If bulbs are selected one by one in random order, what is

the probability that at least two bulbs must be selected to obtain one that is rated 75 W? (Round your answer to three decimal places.)
Mathematics
1 answer:
OLEGan [10]3 years ago
3 0

Answer: 2.833

Step-by-step explanation:

Add up the amount of light bulbs: (7+6+4).

Divide 17 (^the sum^) by 6 (the amount of 75 watt bulbs).

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A sphere has a volume of Vequals=3600 in cubedin3. Find its surface area.
Mice21 [21]
\bf \textit{volume of a sphere}\\\\
V=\cfrac{4}{3}\pi r^3\qquad 
\begin{cases}
r=radius\\
------\\
V=3600
\end{cases}\implies 3600=\cfrac{4}{3}\pi r^3
\\\\\\
3600=\cfrac{4\pi r^3}{3}\implies \sqrt[3]{\cfrac{3\cdot 3600}{4\pi }}=\boxed{r}\\\\
-----------------------------\\\\
\textit{surface area of a sphere}\\\\
S=4\pi r^2\implies S=4\pi \left(\boxed{\sqrt[3]{\cfrac{3\cdot 3600}{4\pi }}}  \right)^2

simplify away
8 0
3 years ago
Leo wants to paint a mural that covers a wall with an area of 600 square feet. The height of the wall is 2/3 of its length. What
Gre4nikov [31]

Answer: attached

Step-by-step explanation:

4 0
3 years ago
There were 12 girls on the basketball team. 3 of them scored over 10 points in the game. What fraction represents the number of
Naily [24]

Answer:

1/4

Step-by-step explanation:

3 out of 12 stored over 10:

3 / 12

simplify

1/4

6 0
2 years ago
What is the greatest common factor of 10x and 22x“?
BartSMP [9]

Answer:

2x

Step-by-step explanation:

x and 2 are common to both 10x and 22x, so 10x + 22x = 2x(5 + 11)

The GCF is 2x.

4 0
3 years ago
A motorcycle insurance company has 5,000 policy holders, and the accident rate is 0.08. the company needs to invest $400,000 thi
Oksi-84 [34.3K]

When the insurance company want a plan with a deductible of $4,000, they need to charge a minimum of $18000 for premiums.

<h3>What is a deductible?</h3>

It should be noted that a deductible simply means the amount of money that is paid out of the pocket of the policy holder.

From the information given, each accident costs $18,000 on average. Therefore, this is the minimum amount of premium.

When they want a plan with a premium of $1,000, the amount that they'll need to charge for deductibles will be:

= (4000/18000) × 1000

= $220

Learn more about deductible on:

brainly.com/question/5306277

#SPJ1

8 0
1 year ago
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