3 years ago

A person places $848oo in an investment account earning an annual rate of 4.1%,

Mathematics

1 answer:

Lady bird [3.3K]3 years ago

8 0

Answer:

I'm pretty sure it's 4 years it's what you think.

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Show your work for -4x+3(2x-5)=31

mina [271]

Step-by-step explanation:

$- 4x + 3(2x - 5) = 31 \\ - 4x + 6x - 15 = 31 \\ 2x - 15 = 31 \\ 2x = 31 + 15 \\ 2x = 46 \\ x = 46 \div 2 \\ x = 23$

4 0

2 years ago

In a random sample of 8 people, the mean commute time to work was 33.5 minutes and the standard deviation was 7.2 minutes. A 95

Elina [12.6K]

Answer: Margin of error = 6.58

Confidence interval = (26.91, 40.08)

Step-by-step explanation:

Since we have given that

Sample size n = 8

Sample mean = 33.5 minutes

Population standard deviation = 9.5 minutes

At 95% confidence interval,

α = 0.05

t = 1.96

So, Margin of error is given by

$t\times \dfrac{\sigma}{\sqrt{n}}\\\\=1.96\times \dfrac{9.5}{\sqrt{8}}\\\\=6.58$

Confidence interval would be

Lower limit:

$\bar{x}-6.58\\\\=33.5-6.58\\\\=26.91$

Upper limit:

$\bar{x}+6.58\\\\=33.5+6.58\\\\=40.08$

Hence, the interval would be (26.91, 40.08)

But at standard deviation 7.2 minutes, the confidence interval was (27.5, 39.5)

Confidence interval using the standard normal distribution is wider than the confidence interval using t distribution.

3 0

3 years ago

A circle has a circumference that measures 18π inches. What is the radius, in inches, of the circle?

sveta [45]

Answer:

the radius will be 9 or b

Step-by-step explanation:

18 is the diameter so you divide by 2 to get the radius which will be 9.

7 0

3 years ago

Corey got 35% off coupon for HEB the store bill came out to $73.80 how nuch money does he owe?

spin [16.1K]

$73.80 - 35% = $47.97 Corey owes $47.97

7 0

3 years ago

What’s the fifth term of a sequence whose first term is 5 and whose common ratio is 3?

SSSSS [86.1K]

Answer:

405.

Step-by-step explanation:

This is a geometric sequence where the nth term = a1 r^(n -1).

Here a1 = 5 and r = 3 so

the fifth term a5 = 5(3)^(5-1)

= 5 * 81

= 405.

4 0

3 years ago