All categories

3 years ago

Select the correct answer

Mathematics

1 answer:

Alexxx [7]3 years ago

5 0

Answer:

The y intercept is 80 and the line of the best fit is -3/5

Step-by-step explanation:

You might be interested in

In a survey, 600 adults in a certain country were asked how many hours they worked in the

Snowcat [4.5K]

Answer:

C. Correct

Step-by-step explanation:

The interpretation of a confidence interval of x% is that we are x% that this interval contains the mean of the population.

So, for example, the interpretation of a confidence interval of 95% is that we are 95% that this interval contains the mean of the population.

In this problem, we have that:

Based on the results, a 95% confidence interval for mean number of hours worked was lower bound: 41.5 and upper bound: 45.6.

Also, the following affiration:

(A) There is a 95% chance the mean number of hours worked by adults in this country in the previous week was between 41.5 hours and 45.6 hours.

This is correct

So, the answer is:

C. Correct

5 0

3 years ago

It’s not C and I suck at math can someone plz help me on this plz and thx

Fittoniya [83]

Answer:

Step-by-step explanation:

The volume (V) of a cone is calculated as

V = πr²h ( r is the base radius and h the perpendicular height )

To calculate the height h use the right triangle formed by the radius and the inclined side.

Given diameter = 22, then r = 22 ÷ 2 = 11 cm

Using Pythagoras' identity on the right triangle, then

h² + 11² = 61² , that is

h² + 121 = 3721 ( subtract 121 from both sides )

h² = 3600 ( take the square root of both sides )

h = $\sqrt{3600}$ = 60

Thus

V = π × 11² × 60

= 3.14 × 121 × 60 ≈ 22796.4 cm³ → a

7 0

3 years ago

Write an equation of the line that passes through (-1,2) with a slope of 4

Iteru [2.4K]

Step-by-step explanation:

Hey there!

Given;

The points is; (-1 , 2) and slope is 4.

Note: Use one-point formula.

$(y - y1) = m(x - x1)$

~ Put all values.

$(y - 2) = 4(x + 1)$

~ Simplify it.

$(y - 2) = 4x + 4$

$4x - y + 6 = 0$

Therefore, the required equation is; 4x-y+6=0.

<h3>Hope it helps...</h3>

6 0

3 years ago

Suppose f is a function with exponential growth and f(0)=1. Explain why f can be represented by a formula of the form

galben [10]

We are supposed to explain why the given function can be expressed in form $f(x)=b^{x}$ , when $f(0)=1$ .

Since the given function is an exponential function we can express it as $f(x)=a(b)^{x}$ .

Now let us substitute x=0 in the given function,

$f(x)=b^{x}$

$f(0)=b^{0}$

$f(0)=1$

Let us substitute x=0 in our function.

$f(0) = a(b)^{0}$

$f(0) = a\cdot 1$

$f(0)=a$

Upon substituting a=1 in our function we will get,

$f(x) = 1(b)^{x}$

$f(x) =(b)^{x}$

Therefore, our function f can be represented by the formula of the form $f(x)=b^{x}$ .

7 0

3 years ago

Read 2 more answers

Ted earned $4,300 from his summer internship that he plans to invest so that he can buy a used car after three years. Ted choose

olganol [36]

Answer: Yes he will be

Step-by-step explanation:

To find out if Ted can afford the car, find the future value of $4,300 in three years.

First convert the number of years and rates to quarterly values as this is the compounding period:

Term = 3 * 4 quarters = 12 quarters

Rate = 5.5% / 4 = 1.375% per quarter

Future value = Amount * ( 1 + rate) ^ term

= 4,300 * ( 1 + 1.375%)¹²

= $5,065.69

Considering that Ted makes $5,065.69 in 3 years, he will be able to buy a car that costs $4,700.

8 0

3 years ago