All categories

3 years ago

60% of a number is 90 what is 50%of the same number

1 answer:

4 0

To get the answer we can use proportion
60% -----------90
50% -----------x
Crossmultiply now
50*90=60*x
4500=60x /:60 (divide both sides by 60)
4500:60=x
75=x - its the result

You might be interested in

Solve the equation 2x+1=x-3

Agata [3.3K]

How to solve your problem

Topics: Algebra, Quadratic Equation

−

2x+1=x-3

2x+1=x−3

Solve

Subtract

from both sides of the equation

−

2x+1=x-3

2x+1=x−3

−

2x+1{\color{#c92786}{-1}}=x-3{\color{#c92786}{-1}}

2x+1−1=x−3−1

Simplify

Subtract the numbers

−

2x=x-4

2x=x−4

Subtract

from both sides of the equation

−

2x=x-4

2x=x−4

−

2x{\color{#c92786}{-x}}=x-4{\color{#c92786}{-x}}

2x−x=x−4−x

Simplify

Combine like terms

Multiply by 1

Combine like terms

−

x=-4

x=−4

Solution

−

5 0

3 years ago

Suppose that an internal report submitted to the managers at a bank in Boston showed that with 95 percent confidence, the propor

Dmitry [639]

Answer:

The sample size used to compute the 95% confidence interval is 1066.

Step-by-step explanation:

The (1 - α)% confidence interval for population proportion is:

$CI=\hat p\pm z_{\alpha/2}\sqrt{\frac{\hat p(1-\hat p)}{n}}$

The 95% confidence interval for proportion of the bank's customers who also have accounts at one or more other banks is (0.45, 0.51).

To compute the sample size used we first need to compute the sample proportion value.

The value of sample proportion is:

$\hat p=\frac{Upper\ limit+Lower\ limit}{2}=\frac{0.45+0.51}{2}=0.48$

Now compute the value of margin of error as follows:

$MOE=\frac{Upper\ limit-Lower\ limit}{2}=\frac{0.51-0.45}{2}=0.03$

The critical value of z for 95% confidence level is:

$z_{\alpha/2}=z_{0.05/2}=z_{0.025}=1.96$

Compute the value of sample size as follows:

$MOE=z_{\alpha/2}\sqrt{\frac{\hat p(1-\hat p)}{n}}\\0.03=1.96\times \sqrt{\frac{0.48(1-0.48)}{n}}\\(\frac{0.03}{1.96})^{2}=\frac{0.48(1-0.48)}{n}\\n=1065.404\\n\approx1066$

Thus, the sample size used to compute the 95% confidence interval is 1066.

4 0

2 years ago

In space, the intersection of a line and a plane is

vredina [299]

I believe the answer is A) Not possible not sure

5 0

3 years ago

I figured out the first part but not B and C

Liula [17]

biomass can be converted directly into liquid fuels, called "biofuels," to help meet transportation fuel needs. The two most common types of biofuels in use today are ethanol and biodiesel, both of which represent the first generation of biofuel technology.

3 0

2 years ago

What is one effect of World Bank loans to developing countries?

matrenka [14]

One example is they help them develop projects

7 0

2 years ago