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3 years ago

Help help help help please

Mathematics

1 answer:

kykrilka [37]3 years ago

8 0

Answer:

Step-by-step explanation:

b is the right answer

it is

sure

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A sum of rs 400 is lent for 3 yrs at the rate of 6% per annum. Find the interest.

Nimfa-mama [501]

Interest is equal to rs 72

Simple Interest is computed by multiplying the principal to the interest rate and the time.

I = P * r * t

Principal = rs 400
Interest rate = 6%
Term / time = 3 yrs

I = 400 * 6% * 3
I = 72 the total interest that must be paid in 3 yrs.

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3 years ago

Is -33 a whole number?

Jet001 [13]

Answer/Step-by-step explanation:

-33 is not a whole number. A whole number is a number(positive) that contains no decimals nor fractions.

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2 years ago

Adult entrance fees to amusement parks in the United States are normally distributed with a population standard deviation of 2.5

kondor19780726 [428]

Answer: 1.509

Step-by-step explanation:

The formula of Margin of Error for (n<30):-

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

Given : Sample size : n= 22

Level of confidence = 0.99

Significance level : $\alpha=1-0.99=0.01$

Using the t-distribution table ,

Critical value : $t_{n-1, \alpha/2}=t_{21,0.005}= 2.831$

Standard deviation: $\sigma=\text{ 2.5 dollars }$

Then, we have

$E=( 2.831)\dfrac{2.5}{\sqrt{22}}\approx1.509$

Hence, the margin of error for a 99% confidence interval for the population mean =1.509

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3 years ago

Simplify the following radicals (in exponential notation) (x^9y^6z^15)^1/3

MAVERICK [17]

$\bf (x^9y^6z^{15})^{\frac{1}{3}}\implies \stackrel{\textit{distributing the exponent}}{\left(x^{9\cdot \frac{1}{3}}y^{6\cdot \frac{1}{3}} z^{15\cdot \frac{1}{3}} \right)}\implies x^3y^2z^5$

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3 years ago

The count in a bacteria culture was 400 after 10 minutes and 1300 after 40 minutes. Asumming the count grows exponentially

Pachacha [2.7K]

I’m not sure actually sorry

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1 year ago