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3 years ago

60 POINTS!! Please help me out with these 2 questions

Mathematics

1 answer:

arsen [322]3 years ago

4 0

Answer:

1. money in the account = 400 + 6t where t is the number of years

2. Total cost = principal ( 1+ rate* time)

Step-by-step explanation:

1. The formula for simple interest is I = PRT where

P = principal

R is the interest rate

T is the time in years

I = 400 * .015 * t

I = 6t where t is the number of year

The amount of money in the account is the principal plus the interest

money in the account = 400 + 6t

Since we were not given the time period, I will leave it here.

2. Since we are paying simple interest

The formula for simple interest is I = PRT where

P = principal

R is the interest rate

T is the time in years

We can figure out what the total interest is

Add it to the amount of the principal

The total amount you will pay on the loan is

Total cost = Principal + interest

= principal + principal * rate * time

= principal ( 1+ rate* time)

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Step-by-step explanation:

52.10 - 49.62 = 2.48

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Answer:

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Step-by-step explanation:

How to solve your problem

3(2+6)

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3 years ago

Consider the accompanying data on flexural strength (MPa) for concrete beams of a certain type.

Vinvika [58]

Answer:

The point estimate for population mean is 8.129 Mpa.

Step-by-step explanation:

We are given the following in the question:

Data on flexural strength(MPa) for concrete beams of a certain type:

11.8, 7.7, 6.5, 6.8, 9.7, 6.8, 7.3, 7.9, 9.7, 8.7, 8.1, 8.5, 6.3, 7.0, 7.3, 7.4, 5.3, 9.0, 8.1, 11.3, 6.3, 7.2, 7.7, 7.8, 11.6, 10.7, 7.0

a) Point estimate of the mean value of strength for the conceptual population of all beams manufactured

We use the sample mean, $\bar{x}$ as the point estimate for population mean.

Formula:

$Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}$

$\bar{x} = \dfrac{\sum x_i}{n} = \dfrac{219.5}{27} = 8.129$

Thus, the point estimate for population mean is 8.129 Mpa.

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3 years ago