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pshichka [43]
3 years ago
11

4

Mathematics
1 answer:
torisob [31]3 years ago
7 0

Answer:

Step-by-step explanation:

Use  the mnemonic  SOH CAH TOA to help remember how the sin, cos, and tan functions fit on a triangle

Tan = Opp / Adj

so for this triangle then   Tan(30) = 5 / b  is correct  :)

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Alex invests his money in an account paying 2% interest compounded semiannually. What is the effective annual yield on this acco
Travka [436]

Answer: 2.01%.

Step-by-step explanation:

Suppose Alex invests $1 into the account for one year. The formula is A=P0⋅(1+rk)N⋅k with P0=$1. We know that r=0.02 and k=2 compounding periods per year. Now, N=1 year. Substituting the values we have A=$1⋅(1+0.022)2=$1.0201. Now, to calculate the effective annual yield, we will use the formula rEFF=A−P0P0. rEFF=1.0201−11=0.0201 or 2.01%. When rounded to two decimals, rEFF=2.01%. However, do not include the % in your answer.

3 0
3 years ago
Do ratios 15:5 and 6:2 form a proportion?
mrs_skeptik [129]

For two ratios to form a proportion they have to be equal.

To see if two ratios are equal we express them in their simplest form.

In this case we notice that in the first ratio both numbers are multiples of five, then:

15\colon5=3\colon1

In the second case we notice that both numbers are multiples of 2, then:

6\colon2=3\colon1

Since both ratios can be simplified to the same final ratio, they form a proportion.

7 0
2 years ago
What is a coeffcient term
Elodia [21]
A coefficient is the number that goes with the letter such as 6x were 6 is the coefficient.
7 0
4 years ago
Read 2 more answers
A teacher graded the tests for each of her students. She calculated a mean grade of 80 and a
son4ous [18]

Answer:

Katrina got 86 in her test

Step-by-step explanation:

given

mean = 80

standard deviation = 3

z-score = 2

Let score of Katrina = x

Recall z-score is calculated by

z-score = (x-mean) / standard deviation

substitute values and solve for x

2 = (x-80)/3

x-80=6

x = 86

7 0
3 years ago
Can someone please help me
Nat2105 [25]

Answer:

Step-by-step explanation:

abs(x)>0

This statement is false because what happens when x = 0? For all other instances, the statement is true, but not for 0.

Zero is not greater than itself.

6 0
4 years ago
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