What is the surface area of the square pyramid? A. 2480 in2 B. 5120 in2 C. 6880 in2 D. 8640 in2

Mathematics

1 answer:

DedPeter [7]3 years ago

6 0

Hello is there anything more like the high or the base because i can't solve it like that without anything

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Number 1. ............................l.........

siniylev [52]

It equals 34.5600000012

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3 years ago

Translate the word phrase into a math expression. six less than eight times a number

qaws [65]

In numbers and a variable it is 8x-6

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3 years ago

Find the value of this expression if x = -1 and<br> y=7.<br> Xy / 8

ioda

-7/8

Step-by-step explanation:

$\frac{xy}{8} \\ = \frac{( - 1) \times 7}{8} \\ = - \frac{7}{8}$

So, the value of xy/8 is -7/8

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2 years ago

Suppose a NBA basketball player has 5% chance of picking up a foul every minute he plays. What is the probability that he will p

alukav5142 [94]

Answer:

He wont foul out with probability 0.9093

Step-by-step explanation:

The total number of fools he picked is a Binomial ditribution noted by X with parameters p = 0.05 and N = 48. The mean of this random variable is μ = np = 48*0.05 = 2.4 and the variance is σ² = np(1-p) = 2.4*0.95 = 2.28, hence its standard deviation is σ = √2.28 = 1.51.

Note that, if approximate probability is asked, we could just approximate X with a Normal random variable with mean 2.4 and standard deviation 1.51 (this can be done because of the central limit theorem). We will calculate the probability manually. He wont foul out if he picks 0,1,2,3 or 4 fouls, thus

$P(X \leq 4) = P(X=0)+P(X=1)+P(X=2)+P(X=3)+P(X=4) \\= 0.95^{48}+48*0.95^{47}*0.05+{48 \choose 2}*0.95^{46}*0.05^2+\\{48 \choose 3}*0.95^{45}*0.05^3+{48 \choose 4}*0.95^{44}*0.05^4 \\= 0.085+0.215+0.266+0.215+0.127 = 0.9093$

As a consecuence, he wont foul out with probability 0.9093.

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3 years ago

Can someone help me with number 4 plz I will give 30 points

djyliett [7]

Answer:

Yes

Step-by-step explanation:

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2 years ago

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