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3 years ago

Please help me I'm so stupid

Mathematics

1 answer:

Tanzania [10]3 years ago

5 0

Answer:

A. yes she is going to have $157

Step-by-step explanation:

346-189=$157

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assume that random guesses are made for 8 multiple choice questions on an SAT test, so that there are n=9 trials, each with prob

melamori03 [73]

Answer:

$P(x$

Step-by-step explanation:

If we call x the number of correct questions obtained in the 9 attempts, then:

x is a discrete random variable that can be modeled by a binomial probability distribution p, with n = 9 trials.

So, the p of x successes has the following formula.

$P(x) =\frac{n!}{x!(n-x)!}*p^x(1-p)^{n-x}$

Where:

n = 9

p = 0.6

We are looking for P(x<4)

By definition:

$P(x$

Then:

$P(x\leq3)=\sum_{x=0}^{3} \frac{9!}{x!(9-x)!}*(0.6)^x(1-0.6)^{9-x}$

$P(x\leq3)=0.0994$

5 0

4 years ago

Find the lateral area of a cone with radius 6 in. and height 10 in. Round your answer to the nearest tenth. Use 3.14 for pi.

zhenek [66]

Lateral Cone Area = PI * radius * slant height

slant height ^ 2 = 6^2 + 10^2

slant height ^ 2 = 36 + 100

slant height ^ 2 = 136

slant height ^ 2 = 11.6619037897

Lateral Cone Area = PI * 6 * 11.66

Lateral Cone Area = 219.6744

That's my calculation and I used an online calculator which says the same thing. It is NOT one of the choices.

online calculator 1728.com/volcone.htm

3 0

3 years ago

NEED HELP ASAP 20POINTS The energy (and cost) needed to operate an air conditioner is proportional to the volume of a space that

Ne4ueva [31]

Sorry if it is incorrect or a step is missing but 301.2

8 0

3 years ago

Babies born after 40 weeks gestation have a mean length of 52.2 centimeters (about 20.6 inches). Babies born one month early hav

scZoUnD [109]

Answer:

The standardized score (z-score), relative to all U.S. births, for a baby with a birth length of 45 centimeters is 2.88cm .

Step-by-step explanation:

It is given that the mean length of the babies born after the 40 weeks gestation period $(\bar{x})$ is 52.2cm

Standard deviation = 2.5

Baby born on one month earlier having mean length $(\bar{x_2})$ = 47.4cm

Now , we will use the formula for z-score ,

$z =\frac{x -\bar{x_1}}{s_1}$

$\frac{45-52.2}{2.5}$

= -2.88

Therefore , A birth length of 45 centimeters is 2.88 below the mean standard deviation.

3 0

3 years ago

a map with a scale of 0.25 inches = 30 miles, the distance between two cities is 8.3 inches. Find the actual distance between th

Crank

Step-by-step explanation:

the answer to your question is400 miles

5 0

3 years ago