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3 years ago

Which expression is equivalent to 16 + 2 * 36?

Mathematics

1 answer:

olga2289 [7]3 years ago

8 0

Answer: F 2^4+2^3 .3^2

Step-by-step explanation:

16+2*36

2^4+72

2^4+2^3 .3^2

here 2^3=8

and 3^2=9

so 8*9=72

You might be interested in

Tan (-3pi/2) what is the value

Andreas93 [3]

tan((−3)(3.141593)2)=tan(−9.4247782)=tan(−4.712389)=−5443746451065123

5 0

3 years ago

You are interested in estimating the the mean weight of the local adult population of female white-tailed deer (doe). From past

alisha [4.7K]

Answer:

$n=(\frac{2.33(19)}{7})^2 =39.996 \approx 40$

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

$\bar X$ represent the sample mean

$\mu$ population mean

$\sigma=19$ represent the assumed population standard deviation

n represent the sample size (variable of interest)

Confidence =0.98 or 98%

Me=0.07 represent the margin of error for this case

Solution to the problem

The margin of error is given by this formula:

$ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (1)

And on this case we have that ME =7 and we are interested in order to find the value of n, if we solve n from equation (1) we got:

$n=(\frac{z_{\alpha/2} \sigma}{ME})^2$ (2)

The critical value for 98% of confidence interval now can be founded using the normal distribution. And in excel we can use this formla to find it:"=-NORM.INV(0.01,0,1)", and we got $z_{\alpha/2}=2.33$ , replacing into formula (2) we got:

$n=(\frac{2.33(19)}{7})^2 =39.996 \approx 40$

So the answer for this case would be n=40 rounded up to the nearest integer

6 0

3 years ago

Please! Quick, how may days are in between 12/1/16 and 7/20/20???

lozanna [386]

1,327 days are in between 12/1/16 and 7/20/20

8 0

3 years ago

Read 2 more answers

Suppose a tank contains 400 gallons of salt water. If pure water flows into the tank at the rate of 7 gallons per minute and the

Strike441 [17]

Answer:

Step-by-step explanation:

This is a differential equation problem most easily solved with an exponential decay equation of the form

$y=Ce^{kt}$ . We know that the initial amount of salt in the tank is 28 pounds, so

C = 28. Now we just need to find k.

The concentration of salt changes as the pure water flows in and the salt water flows out. So the change in concentration, where y is the concentration of salt in the tank, is $\frac{dy}{dt}$ . Thus, the change in the concentration of salt is found in

$\frac{dy}{dt}=$ inflow of salt - outflow of salt

Pure water, what is flowing into the tank, has no salt in it at all; and since we don't know how much salt is leaving (our unknown, basically), the outflow at 3 gal/min is 3 times the amount of salt leaving out of the 400 gallons of salt water at time t:

$3(\frac{y}{400})$