To which set of numbers does -38 belong to brainly

shutvik [7]

Step-by-step explanation:

1. Draw the bottom line EF with a ruler.

2. Use a protractor and draw 2 long lines at 50 degrees, one from point E and one from F and make sure the two lines intersect.

7 0

3 years ago

Solve using derivatives.

Bond [772]

Answer:

Below in bold.

Step-by-step explanation:

The surface area of the box

= x^2 + 4hx where x = a side of the square base and h is the height.

So x^2 + 4hx = 8

The volume of the box

V = x^2h

From the first equation we solve for h

4hx = 8 - x^2

h = (8 - x^2) / 4x

Now we substitute for h in the formula for the volume:

V = x^2 * (8 - x^2) / 4x

V = 8x^2 - x^4 / 4x

V = 2x - 0.25x^3

Finding the derivative:

V' = 2 - 0.75x^2 = 0 for max/mimn values

x^2 = 2/ 0.75 = 2.667

x = 1.633.

So the length and width of the base is 1.633 m and the height

= ( 8 - 2.667) / (4*1.633)

= 0.816 m

The maximum volume = 0.816 * 2.667 = 2.177 m^2.

The answers are correct to the nearest thousandth.

7 0

3 years ago

A professor teaches a certain section of material using a lot of examples with sports and cars to illustrate. He is concerned th

ser-zykov [4K]

Answer:

Step-by-step explanation:

Let X represent for males and Y for females

Given that

Group Group One Group Two

Mean 84.00 78.00

SD 4.00 8.00

SEM 1.26 2.53

N 10 10

SEM is calculated as $\frac{s}{\sqrt{n} }$ for each group

$H_0: \bar x = \bar y\\H_a: \bar x \neq \bar y$

(Two tailed test at 5% significance level)

$t = 2.1213\\ df = 18\\ standard error of difference = 2.828\\p=0.0480$

Since p <0.05 we reject H0 and there is significant difference between the groups.

A.Exam scores were significantly higher in the male group, t(18) = 2.83, p < .05B

4 0

3 years ago

Approximately how many square inches of fabric were used to make the triangular flag? 15 square inches 76 square inches 186 squa

Law Incorporation [45]

The area used to make the triangular flag is 15 square inches.

Given

Two of the sides are 8 in.

Lila made a triangular flag to cheer on her favorite sports team.

The perimeter of the flag is 20 inches.

<h3>What is Heron’s formula?</h3>

Semi-perimeter is equal to the sum of all three sides of the triangle divided by 2.

Then,

The value of S is;

$\rm S = \dfrac{20}{2}\\\\S =10$

Therefore,

The area used to make the triangular flag is;

$\rm Area = \sqrt{s(s-a)(s-b)(s-c)} \\\\A rea= \sqrt { (10)(10-8)(10-8)(10-4) }\\\\Area = \sqrt{10 \times 2 \times 2\times 6}\\\\Area = \sqrt{240}\\\\Area = 15.49$

Hence, the area used to make the triangular flag is 15 square inches.

To know more about Heron's formula click the link given below.

brainly.com/question/13907146

8 0

2 years ago

2 is 10 times 0.02 tire of false

chubhunter [2.5K]

This is false because when you multiply a number by 10, you simply move the decimal place one to the right. In this case, when we multiply 0.02 by 10, we get .2. Had we multiplied 0.02 by 100, we would have gotten 2.

4 0

3 years ago