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2 years ago

This is an important test please help.

Mathematics

2 answers:

melomori [17]2 years ago

7 0

Answer:

60 percent

Step-by-step explanation:

please mark as brainliest

RoseWind [281]2 years ago

3 0

Answer:

60%

Step-by-step explanation:

54 /90 x 100% = 60%

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In a research report, the researcher provides the following information: The seven men were ages 32 to 45 (M

rodikova [14]

The answer is Demographic data

The researcher includes the following material in a research report: The seven males varied in age from 32 to 45 (M = 38), had a high school education (two had high school diplomas, one had an associate degree, three had an undergraduate degree, and one had a master's degree), and had yearly incomes ranging from $20,000 to $100,000 (M = $52,000). Demographic data refers to information on the characteristics of the individuals being investigated.

What is Demographic data?

Demographic analysis is the examination of a population's characteristics such as age, ethnicity, and gender.
Demographic data is a statistical representation of socioeconomic information such as employment, education, income, marriage rates, birth and death rates, and so on.
Age, race, ethnicity, gender, marital status, income, education, and occupation are some examples of demographic information. With survey questions, you may quickly and efficiently collect this sort of information.

To learn more about Demographic data visit:

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8 0

1 year ago

70 thousand written in standard form or word form explain

dangina [55]

To solve, you must know that thousand = 1000. Multiply the two numbers together

70 thousand = 70 x 1000 = 70,000

70,000 is your standard form.

seventy-thousand is your word form

hope this helps

4 0

2 years ago

Read 2 more answers

0. A cylindrical tin has a radius of 3 cm. What is the shortest length of a string that can be wound once round the curved surfa

madreJ [45]

Answer: 18.84cm

Step-by-step explanation: 3 x 2 x 3.14 = 18.84cm

4 0

2 years ago

cylinder shaped can needs to be constructed to hold 200 cubic centimeters of soup. The material for the sides of the can costs 0

Dafna11 [192]

Answer:

Radius=2.09 cm

Height,h=14.57 cm

Step-by-step explanation:

We are given that

Volume of cylinderical shaped can=200 cubic cm.

Cost of sides of can=0.02 cents per square cm

Cost of top and bottom of the can =0.07 cents per square cm

Curved surface area of cylinder= $2\pi rh$

Area of circular base=Area of circular top= $\pi r^2$

Total cost,C(r)= $0.02\times 2\pi rh+2\pi r^2\times 0.07$

Volume of cylinder, $V=\pi r^2 h$

$200=\pi r^2 h$

$h=\frac{200}{\pi r^2}$

Substitute the value of h

$C(r)=0.02\times 2\pi r\times \frac{200}{\pi r^2}+2\pi r^2\times 0.07$

$C(r)=\frac{8}{r}+0.14\pi r^2$

Differentiate w.r.t r

$C'(r)=-\frac{8}{r^2}+0.28\pi r$

$C'(r)=0$

$-\frac{8}{r^2}+0.28\pi r=0$

$0.28\pi r=\frac{8}{r^2}$

$r^3=\frac{8}{0.28\pi}=9.095$

$r=(9.095)^{\frac{1}{3}}=2.09$

Again, differentiate w.r.t r

$C''(r)=\frac{16}{r^3}+0.28\pi$

Substitute the value of r

$C''(2.09)=\frac{16}{(2.09)^3}+0.28\pi=2.63>0$

Therefore,the product cost is minimum at r=2.09

h= $\frac{200}{\pi (2.09)^2}=14.57$

Radius of can,r=2.09 cm

Height of cone,h=14.57 cm

4 0

3 years ago

Select the correct properties of slope below.

Alinara [238K]

<span>A. Lines that go up from left to right should have a positive slope.
B. Lines that go down from left to right should have a negative slope.
</span><span>D. The slope of a steep line should be bigger than the slope of a flat line.
E. The slope of a steep line should be smaller than the slope of a flat line.</span>

3 0

3 years ago