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pashok25 [27]
3 years ago
10

Using pemdas please

Mathematics
2 answers:
adell [148]3 years ago
7 0

Answer:

60

Step-by-step explanation:

5²= 10

10x3=30

90-30=60

Blizzard [7]3 years ago
4 0

Hello!

Let’s look at the acronym PEMDAS:

P - parentheses

E - exponents

M - muliplication

D - division

A - addition

S - subtraction

Now we can apply this order of operations to the given equation. Because there are no parentheses, we begin by simplifying the exponents:

90 - 5² x 3

90 - 25 x 3

Now we can move on to multiplication:

90 - 25 x 3

90 - 75

Finally, we can skip down to subtraction:

90 - 75

15

Using PEMDAS order of operations, the correct answer is 15.

I hope this helps!

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1. 14=7b<br> 2. -11=k/4<br> 3.6z=-6
Romashka-Z-Leto [24]

Answer:

the anwer is 14-2294-dhi2

Step-by-step explanation:

Because 14 is - 4 you multiple to 5 equal= dhi2

3 0
2 years ago
Find the area of the shape. Either enter an exact answer in terms of pi or use 3.14 for pi and enter your answer as a decimal.
Darya [45]

Answer:

314

Step-by-step explanation:

First, find the diameter which is 10 and square it. Then, multiply by pi or 3.14 to get 314.

(IF THIS HELPED PLEASE GIVE BRAINLIEST!)

6 0
2 years ago
A candidate for a US Representative seat from Indiana hires a polling firm to gauge her percentage of support among voters in he
UkoKoshka [18]

Answer:

a) The minimum sample size is 601.

b) The minimum sample size is 2401.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

The margin of error is:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

For this problem, we have that:

We dont know the true proportion, so we use \pi = 0.5, which is when we are are going to need the largest sample size.

95% confidence level

So \alpha = 0.05, z is the value of Z that has a pvalue of 1 - \frac{0.05}{2} = 0.975, so Z = 1.96.

a. If a 95% confidence interval with a margin of error of no more than 0.04 is desired, give a close estimate of the minimum sample size that will guarantee that the desired margin of error is achieved. (Remember to round up any result, if necessary.)

This is n for which M = 0.04. So

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

0.04 = 1.96\sqrt{\frac{0.5*0.5}{n}}

0.04\sqrt{n} = 1.96*0.5

\sqrt{n} = \frac{1.96*0.5}{0.04}

(\sqrt{n})^2 = (\frac{1.96*0.5}{0.04})^2

n = 600.25

Rounding up

The minimum sample size is 601.

b. If a 95% confidence interval with a margin of error of no more than 0.02 is desired, give a close estimate of the minimum sample size necessary to achieve the desired margin of error.

Now we want n for which M = 0.02. So

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

0.02 = 1.96\sqrt{\frac{0.5*0.5}{n}}

0.02\sqrt{n} = 1.96*0.5

\sqrt{n} = \frac{1.96*0.5}{0.02}

(\sqrt{n})^2 = (\frac{1.96*0.5}{0.02})^2

n = 2401

The minimum sample size is 2401.

4 0
3 years ago
Help...
PolarNik [594]

Answer: perm will cost $48

Step-by-step explanation:

Let x be cost of haircut

So perm will cost her 2x

So

x + 2x + 5 = 77

3x = 72

x = 24

Perm will cost 2x24 = 48

4 0
3 years ago
512/2 simplified fraction form
Dvinal [7]

Step-by-step explanation:

\frac{512}{2}  \\  \\  \frac{201}{1}

5 0
3 years ago
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