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finlep [7]
4 years ago
10

A circle has a diameter of 10 yards. What is it’s circumference? Use 3.14 for , and do not round your answer. Be sure to include

the correct unit in your answer.

Mathematics
1 answer:
Jlenok [28]4 years ago
4 0
The answer is 31.415
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How many ways can you make change for a $50 bill using $5, $10, and $20 bills?
aleksley [76]

Answer:

There are 12 ways to make change for a $50 bill using $5, $10 and $20 bills

Step-by-step explanation:

Let's write down every possibility starting by using the largest quantity of $20 bills and we'll go from there, everytime that we get a $10 bill we will split it in the next option into 2 $5 bills.

(20)(20)(10)

(20)(20)(5)(5)

(20) (10)(10)(10)

(20)(10)(10)(5)(5)

(20)(10)(5)(5)(5)(5)

(20)(5)(5)(5)(5)(5)(5)

Now we start with the largest quantity of $10 bills (5) and go from there, splitting them into two 5 dollar bills in the next option.

(10)(10)(10)(10)(10)

(10)(10)(10)(10)(5)(5)

(10)(10)(10)(5)(5)(5)(5)

(10)(10)(5)(5)(5)(5)(5)(5)

(10)(5)(5)(5)(5)(5)(5)(5)(5)

(5)(5)(5)(5)(5)(5)(5)(5)(5)(5)

3 0
3 years ago
A homogeneous second-order linear differential equation, two functions y1 and y2 , and a pair of initial conditions are given be
Basile [38]

Answer:

Step-by-step explanation:

Check part

y= C_1y_1 + C_2y_2 = C_1cos(7x)+C_2sin(7x)

y'= -7 C_1sin(7x)+7C_2cos(7x)

y"= -49 C_1cos(7x) - 49 C_2sin(7x)

Now, replace to the original one.

y"+49 y = -49C_1cos(7x)-49 C_2 sin(7x) + 49 C_1cos(7x) +49 C_2sin(7x) = 0\\

Done!!

Particular solution

y(0) = C_1cos(0) + C_2 sin(0) = C_1= 10

I believe that y'(0) = 4, not y(0) anymore. Since y(0) CANNOT have two different solution.

y(0)'= -7 C_1sin(0) + 7 C_2 cos (0) = 7 C_2= -4

C_2 = -4/7

The last step is to put C1, C2 into your solution. You finish it.

4 0
4 years ago
Find sin(α) and cos(β), tan(α) and cot(β), and sec(α) and csc(β). The hypotenuse is 7 and side is 4.
Shalnov [3]

The triangle is missing, so i have attached it.

Answer:

1)sin(α) = 4/7

2)cos(β) = 4/7

3)tan(α) = 4/√33

4)cot(β) = 4/√33

5)sec(α) = 7/√33

6)csc(β) = 7/√33

Step-by-step explanation:

(1) sin(α)

From trigonometric ratios, we know that sine of an angle in a right angle triangle = opposite/hypotenuse.

Now, in this question, the opposite side to α is 4 and the hypotenuse is 7. Thus, sin(α) = 4/7

2) cos(β)

Cosine of an angle = adjacent side/hypotenuse.

In the question, the adjacent side to the angle β is 4 and the hypotenuse is 7. Thus, cos(β) = 4/7

3)tan(α)

tan of an angle = opposite/adjacent side. The opposite side to α is 4, but the adjacent side is unknown.

Using the pythagoras theorem,

Adjacent side = √(7² - 4²)

Adjacent side = √(49 - 16)

Adjacent side = √33.

Thus, tan(α) = 4/√33

4) cot(β)

cot of an angle is the reciprocal of tangent of same angle.

The adjacent side to β is 4 while the opposite is √33.

So, tan(β) = (√33)/4

cot(β) = 1/tan(β)

cot(β) = 1/[(√33)/4]

cot(β) = 4/√33

5)sec(α)

sec of an angle is equal to one divided by cosine of that same angle, so it equals hypotenuse divided by the adjacent. The hypotenuse is 7 and the adjacent side to α is √33.

Thus, sec(α) = 1/cosα = 7/√33.

6) csc(β)

Csc of an angle is equal to one divided by sine of same angle, so it equals hypotenuses divided by the opposite. The hypotenuse is 7 and the opposite side to β is √33.

Thus, csc(β) = 1/sin(β) = 7/√33

4 0
3 years ago
Select all the examples of categorical data. colors number of siblings favorite pet profits genre of music
bulgar [2K]

Answer:

Color, favorite pet, genre of music

Step-by-step explanation:

Categorical variables are simply statistical variables which are non - numeric, usually employed in characterization and groupings based on a certain number of fixed attributes, categories. In the options atated above, the categorical variables fall under a heading with a limited and fixed attributes such as color, pet and genre of music. However, options such as number of siblings and profit are purely numeric variables which can take up any numeric digits and allow for direct numeric computation. They are called quantitative variables.

3 0
4 years ago
Tom works part-time at a theme park. last week he worked the following hours but he needs to complete his timesheet in decimals.
leva [86]
He makes $6.72 an hour. divide 173 by 25 hours 
4 0
3 years ago
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