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DerKrebs [107]
3 years ago
14

There are 4 Russian dolls. The largest doll is 12 inches tall. The height of each of the other dolls is 7/10 the height of the n

ext larger doll. What expression can be used to find the height of the smallest doll?
Mathematics
2 answers:
NeX [460]3 years ago
5 0
Height of doll ÷ (7/10 of the height of doll)= size of the next doll

or
h÷(7/10)h = n
fgiga [73]3 years ago
4 0
X= 12(.7)^x(exponent)
x is the doll you are on. For example if your looking for the height of the height of the doll after the 12 in. one then x=2 and so on
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can someone help me with this project? the words are supposed to be like a valentine love thing. example: you+me=us
Shkiper50 [21]

“You are my Valentine every day, in every way.” “We’re growing old together with a love that’s forever young.” “These days, most people can’t remember a time when we weren’t us. That’s a sweet, sweet thing.” “You still make me laugh like crazy.

Sure hope this helps you

8 0
3 years ago
Read 2 more answers
A silo is a composite of a cylindrical tower with a cone for a roof. Find the volume of the silo if the
qaws [65]

Answer:

5127079.21 cubic feet

Step-by-step explanation:

The silo is in the shape of a cylinder and a cone.

The volume of the silo will be the sum of the volumes of the cylinder and the cone.

Therefore, its volume is:

V = \pi r^2h + \frac{1}{3} \pi rH

where r = radius of cylinder and cone

h = height of cylinder

H = height of cone

The radius of the base is 120 feet, the height of the roof (cone) is 25 feet. The height of the entire silo is 130 feet. This means that the height of the cylinder is:

130 - 25 = 105 feet

Therefore, the volume of the silo is:

V = (\pi * 120^2 * 105) + (\frac{1}{3} * 120^2 * 25)\\\\V = 4750088.09 + 376991.12\\\\V = 5127079.21 ft^3

The volume of the silo is 5127079.21 cubic feet.

4 0
3 years ago
Sales tax is 6%. Bought car for$820 what was cost of car
pogonyaev
820 + .06(820)
820 + 49.2
869.2
The cost of the car is $869.20.
8 0
4 years ago
Read 2 more answers
A study1 conducted in July 2015 examines smartphone ownership by US adults. A random sample of 2001 people were surveyed, and th
dusya [7]

Answer:

a) Null hypothesis:p_{1} = p_{2}    

Alternative hypothesis:p_{1} \neq p_{2}  

b) z=\frac{p_{1}-p_{2}}{\sqrt{\hat p (1-\hat p)(\frac{1}{n_{1}}+\frac{1}{n_{2}})}}   (1)  

Where \hat p=\frac{X_{1}+X_{2}}{n_{1}+n_{2}}=\frac{688+671}{989+1012}=0.679  

c) z=\frac{0.696-0.663}{\sqrt{0.679(1-0.679)(\frac{1}{989}+\frac{1}{1012})}}=1.58    

d) For this case we see that \hat p_1 > \hat p_2 so then the answer for this cae would men

Step-by-step explanation:

Information given

X_{1}=688 represent the number of men with smartphone  

X_{2}=671 represent the number of women with smartphone

n_{1}=989 sample of men selected

n_{2}=1012 sample of women selected

p_{1}=\frac{688}{989}=0.696 represent the proportion of men with smartphone

p_{2}=\frac{671}{1012}=0.663 represent the proportion of women with smartphone

\hat p represent the pooled estimate of p

z would represent the statistic

p_v represent the value

Part a

We want to test if we have difference in the proportion owning a smartphone between men and women, the system of hypothesis would be:  

Null hypothesis:p_{1} = p_{2}    

Alternative hypothesis:p_{1} \neq p_{2}    

Part b

The statistic for this case is given by:

z=\frac{p_{1}-p_{2}}{\sqrt{\hat p (1-\hat p)(\frac{1}{n_{1}}+\frac{1}{n_{2}})}}   (1)  

Where \hat p=\frac{X_{1}+X_{2}}{n_{1}+n_{2}}=\frac{688+671}{989+1012}=0.679  

Part c

Replacing the info given we got:

z=\frac{0.696-0.663}{\sqrt{0.679(1-0.679)(\frac{1}{989}+\frac{1}{1012})}}=1.58    

Part d

For this case we see that \hat p_1 > \hat p_2 so then the answer for this cae would men

4 0
3 years ago
A bag with 8 marbles are shown below.What is the probability that they are white or grey
horrorfan [7]

Answer: 2/8

Step-by-step explanation:

The probability that the marbles are white or grey is 2/8 because since there is 2 marbles and the total is 8 so you have a probability of 25% to get white or gray

3 0
3 years ago
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