What is the difference between-10 and9?????

△FSB∼△ZDR .

Leya [2.2K]

Answer: 22 units.

Step-by-step explanation:

Here FSB and ZDR are two triangles.

In which, FS = 38 unit, FB = 55 unit, ZD = 15.2 unit and ZR = x unit.

Also, $\triangle FSB\sim \triangle ZDR$

Thus, By the property of similarity,

$\frac{FS}{ZD} = \frac{FB}{ZR}$

⇒ $\frac{38}{15.2} = \frac{55}{x}$

⇒ $x = \frac{55\times 15.2}{38}$

⇒ $x = \frac{836}{38}$

⇒ $x = 22$

Thus, ZR = 22 unit.

3 0

3 years ago

Read 2 more answers

Christopher's best time in a race is four seconds faster than his second-best time. his second best time is 1 1/3 times slower t

a_sh-v [17]

If his best time is x, and the best time is smaller, then (1+1/3)*x=his second best time. If x+4=his second best time (since his second best time is 4 seconds slower), then (1+1/3)*x=x+4. Multiplying it out, we get (3/3+1/3)*x=x+4
=4x/3=x+4. Subtracting x from both sides, we get 4x/3-3x/3=x/3=4. Multiplying both sides by 3, we get x=12=his best time

8 0

4 years ago

Luis bought a box of 84 nails.He used 3/4 the nails in the box.How many nails did he use?

Taya2010 [7]

Answer: 63

Step By Step: Put 84 over a 1 to make this easier. One in the format, multiply 84/1 by 3/4. You should get 252/4. One you simply this you should get 63.

6 0

3 years ago

The area of the base of a cube is 36 in2.<br> What is the total surface area of the cube?

irina [24]

216 in^2 ( its 2 squared but that’s how I can write it on my phone)

All the sides of a cube are the same and there are 6 sides to a cube so if we have 36 as our are of the base then we just have to multiply that by 6

36 x 6= 216

4 0

3 years ago

In a simple random sample of 1000 Americans, it was found that 61% were satisfied with the service provided by the dealer from w

BlackZzzverrR [31]

Answer:

c. smaller for the sample of Canadians, since the percentage satisfied was smaller than that for the Americans.

Correct we see that the proportion of Canadians is lower than the proportion of Americans since 0.58<0.61. And the reason why is by the percentage.

Step-by-step explanation:

Data given and notation

$X_{A}=610$ represent the number of people of America satisfied

$X_{C}=580$ represent the number of people of Canada satisfied

$n_{A}=1000$ sample of Americans selected

$n_{C}=1000$ sample of Canadians selected

$p_{A}=\frac{610}{1000}=0.61$ represent the proportion of American people satisifed

$p_{C}=\frac{580}{1000}=0.58$ represent the proportion of Canadians satisfied

$\hat p$ represent the pooled estimate of p

Solution to the problem

If we analyze one by one the optiosn we have this:

a. larger for the Canadians because the sample size is smaller.

False, both have the same the same sample size of 1000 and the proportion of Canadians is less than the proportion of Americans.

b. smaller for the sample of Canadians, since the population of Canada is less than half that of the United States. Hence, the sample is a larger proportion of the population.

False, the proportion of Canada is not less than half of the United States since the difference is just 0.61-0.58=0.03

c. smaller for the sample of Canadians, since the percentage satisfied was smaller than that for the Americans.

Correct we see that the proportion of Canadians is lower than the proportion of Americans since 0.58<0.61. And the reason why is by the percentage.

d. larger for the Canadians, since Canadian citizens are more widely dispersed throughout their country than American citizens are in the United States. Hence, Canadians have more variable views.

False the porportion of Canadians 0.58 is NOT higher than the proportion of Americans satisfied 0.61 since 0.58 is not less than 0.61.

5 0

3 years ago

Read 2 more answers