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3 years ago

What is the surface area of a triangular pyramid which has 3 sides with a length of 7 cm each and a height of 10 cm

Mathematics

2 answers:

nika2105 [10]3 years ago

3 0

I think it is base times hight

Ipatiy [6.2K]3 years ago

3 0

if your going to find the surface area the formula is s=Ph+2B

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When 8 is added to a certain number and the sum is multiplied by 3, the result is 57. Find the number.

ivann1987 [24]

Answer:

The number is 11.

Step-by-step explanation:

$3(8+x)=57\\24+3x=57\\3x=33\\x=11$

3 0

3 years ago

Solve the quadratic equation numerically (using tables of x- and y- values).

kolezko [41]

(x) (x + 5) = 0

Therefore:

x = 0

x + 5 = 0
x = 0 - 5
x = -5

6 0

3 years ago

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There are 32 radios , 8 of them are out of order. what percent of radios are out of order ?

kondor19780726 [428]

Answer:

$\large\boxed{\fcolorbox{blue}$

5 0

3 years ago

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The graph of the function f(x)=10/x+2 is shown below. What is the vertical asymptote of the function? x = –10 x = –2 x = 0 x = 2

White raven [17]

Red line.
Answer: x = -2

$f(x)=\dfrac{10}{x+2}\\\\x+2\neq0\to x\neq-2$
Therefore, the vertical asymptote of function f(x) is x = -2.

4 0

4 years ago

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A pharmaceutical company receives large shipments of aspirin tablets. The acceptance sampling plan is to randomly select and tes

Pavel [41]

Answer:

0.818

Step-by-step explanation:

Since the shipment has a ton of aspirin tablets, we can assume that we pick 13 of them <em>with</em> <em>reposition, </em>because the probability shoudn't change dramatically from the probability of picking without reposition if we do so.

We call D the amount of defective tablets. If we assume that we pick the tablets with reposition, then we obtain that D is a random variable of Binomial distribution with parameters 13 and 0.6 (the probability of picking a defective tablet).

We want D to be at most one. To calculate the probability of that event we add up the probability of D being equal to 0 and the probability of D being equal to one. Since D is binomial, we have

$P(D = 0) = (1-0.06)^{13} = 0.447$
$P(D = 1) = {13 \choose 1} * 0.06^1 * (1-0.06)^{12} = 13*0.06*0.94^{12} = 0.371$

We conclude that

$P(D \leq 1) = P(D = 0) + P(D = 1) = 0.447+0.371 = 0.818$

Hence, the shipment will be accepted with probability 0.818

<em>I hope this helps you!</em>

6 0

3 years ago