All categories

3 years ago

I need to know how to do this step by step

Mathematics

2 answers:

SCORPION-xisa [38]3 years ago

8 0

Multiple negative 0.5 to negative 8 and it equals 4

mariarad [96]3 years ago

5 0

Multiply negative 0.5 times negative 8
The answer is 4

You might be interested in

An official stands 2 meters from the edge of a discus circle and 3 meters from a point of tangency How far is the official from

Pachacha [2.7K]

Answer: 3.25 m

Step-by-step explanation:

as a tangency and a radius make a right angle, we can use Pythagoras.

c² = a² + b²

(r + 2)² = r² + 3²

r² + 4r + 4 = r² + 9

4r = 5

r = 1.25 m

so the official is standing 1.25 + 2 = 3.25 m from the center of the circle

This makes sense as a standard discus throwing circle is 2.5 m dia.

6 0

3 years ago

What is the volume of a cube in cubic feet that is 3/5 of a football long

Damm [24]

The answer of that question is a lot, idk

7 0

3 years ago

Rosie buys 10 bags of dried fruit.

laiz [17]

Answer:

10 kg

1kg for each back = 1kg×10 bags = 10kg

6 0

3 years ago

Read 2 more answers

A study of women’s weights found that a randomly selected sample of 234 women had a mean weight of 157.3 lb. Assuming that the p

Scilla [17]

Answer:

$157.3-1.96\frac{15.6}{\sqrt{234}}=155.301$

$157.3+1.96\frac{15.6}{\sqrt{234}}=159.299$

So on this case the 95% confidence interval would be given by (155.301;159.299)

And the best option would be:

B. (155.3, 159,3)

Step-by-step explanation:

Information given

$\bar X=157.3$ represent the sample mean

$\mu$ population mean (variable of interest)

$\sigma =15.6$ represent the population standard deviation

n=234 represent the sample size

Confidence interval

The confidence interval for the mean is given by the following formula:

$\bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (1)

The Confidence level is is 0.95 or 95%, the significance is $\alpha=0.05$ and $\alpha/2 =0.025$ , the critical value for this case would be $z_{\alpha/2}=1.96$

And replacing we got:

$157.3-1.96\frac{15.6}{\sqrt{234}}=155.301$

$157.3+1.96\frac{15.6}{\sqrt{234}}=159.299$

So on this case the 95% confidence interval would be given by (155.301;159.299)

And the best option would be:

B. (155.3, 159,3)

5 0

4 years ago

Predict the miles traveled in 5 hours at a rate of 189 miles in 3 hours

wel

312 miles were traveled in 5 hours

7 0

4 years ago