All categories

3 years ago

Van found the change in a scale factor. His work is shown below. What error did Ivan make?

Mathematics

1 answer:

8090 [49]3 years ago

4 0

Answer:

Ivan wrote the ratio incorrectly. The ratio should be written as the old length to the new length, so it should be 35

, which reduces to 7

. When going from larger to smaller dimensions, the change in the scale factor is a ratio that looks like an improper fraction, with a larger number in the numerator and a smaller number in the denominator.

Step-by-step explanation:

You might be interested in

Dwayne starts at the surface of the water and swims to -25 feet. From there he swims +10 feet to see the fish and then back down

d1i1m1o1n [39]

(-25) + 10 + (-5) = -20 feet is his current position. To reach zero, he should add 20 feet to his altitude.

7 0

4 years ago

Is x=10 a solution to this equation? 3x2 = 900

bixtya [17]

3(10)^2 = 900

300 = 900

false; X=10 is not a solution

5 0

3 years ago

A train travels 120 miles in one hour. what is its speed in miles per minute

Eddi Din [679]

Since 1 hour = 60 minutes,
Hence, 120 miles/hour = 120 miles / 60 minutes = 2 miles/minute

8 0

4 years ago

You measure the weight of 49 backpacks, and find they have a mean weight of 67 ounces. Assume the population standard deviation

trasher [3.6K]

Answer: 2.36

Step-by-step explanation:

The formula to find the margin of error is given by :-

$E=z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$

Given : Significance level : $\alpha: 1-0.94=0.06$

Critical value : $z_{\alpha/2}=1.88$ [Using standard normal distribution table]

Sample size : n=49

Standard deviation : 8.8 ounces

Then , the margin of error will be :-

$E=(1.88)\dfrac{8.8}{\sqrt{49}}\\\\\Rightarrow\ E=2.36342857143\approx2.36$

Hence, the margin of error associated with a 94% confidence interval for the true population mean backpack weight = 2.36

3 0

3 years ago

If a<b and c<b, then a<c. True or False

Julli [10]

Answer:

False

Step-by-step explanation:

should be false

5 0

3 years ago