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Dmitriy789 [7]
4 years ago
14

A coin is tossed 20 times. It lands on heads 9 times. What is the P(H) according to your experiment? Write your answer as a frac

tion, decimal, and percent.
Mathematics
1 answer:
Mama L [17]4 years ago
8 0

Answer:

\frac{9}{20}=0.45=45%

Step-by-step explanation:

Probability is found by first forming a fraction where the numerator represents the number of desired outcomes and the denominator represents the total number of outcomes.  In this case, the desired outcomes is the amount of times the coin lands on heads (9) and the total outcomes is the number of times the coin is tossed (20):

\frac{9}{20}

Divide numerator by denominator to get a decimal: 9÷20= 0.45

Multiply the decimal by 100 to get a percent: 0.45 x 100 = 45%

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I think I know this much so far for A (but I could be wrong):
Eduardwww [97]
Part A. You have the correct first and second derivative.

---------------------------------------------------------------------

Part B. You'll need to be more specific. What I would do is show how the quantity (-2x+1)^4 is always nonnegative. This is because x^4 = (x^2)^2 is always nonnegative. So (-2x+1)^4 >= 0. The coefficient -10a is either positive or negative depending on the value of 'a'. If a > 0, then -10a is negative. Making h ' (x) negative. So in this case, h(x) is monotonically decreasing always. On the flip side, if a < 0, then h ' (x) is monotonically increasing as h ' (x) is positive.

-------------------------------------------------------------

Part C. What this is saying is basically "if we change 'a' and/or 'b', then the extrema will NOT change". So is that the case? Let's find out

To find the relative extrema, aka local extrema, we plug in h ' (x) = 0
h  ' (x) = -10a(-2x+1)^4
0 = -10a(-2x+1)^4
so either
-10a = 0 or (-2x+1)^4 = 0
The first part is all we care about. Solving for 'a' gets us a = 0. 
But there's a problem. It's clearly stated that 'a' is nonzero. So in any other case, the value of 'a' doesn't lead to altering the path in terms of finding the extrema. We'll focus on solving (-2x+1)^4 = 0 for x. Also, the parameter b is nowhere to be found in h ' (x) so that's out as well. 
6 0
3 years ago
Is my answer correct
kondor19780726 [428]

Answer:

Yes, you are correct.

Step-by-step explanation:

\text{Let the number of puzzle solved by Child B is} x\text{.}

\text{Then the average number of puzzle solved is}

\frac{5x+x+(x+4)}{3}=13

\frac{7x+4}{3}=13

7x+4=39

7x=35

x=5

\text{Therefore, the number of puzzles solved by child A is }5x=5\cdot5=25

\color{blue}\text{A little tips here: You can check it by substituting your answer to the original equation.}

7 0
3 years ago
Read 2 more answers
What multiplies to be 280 and adds to be negative 36
photoshop1234 [79]
The two numbers are -18+ 2√(11) and -18 -2√(11).

-18+ 2√(11)+ [-18 -2√(11)]= -36
[-18+ 2√(11)]* [-18 -2√(11)]= 280.

Hope this helps~


4 0
4 years ago
A student purchases school supplies at a store where the sale tax is 7%. The pre-tax price of the supplies is $48. What is the t
Alenkasestr [34]

Solution: We are given:

Sales tax =7\%

The pre-tax price of the supplies = 48

We have to find the total cost of the supplies.

We first need to find the sales tax on the price of supplies. The sales tax amount is:

7\% of 48=0.07 \times 48=3.36

Therefore, the total cost of the supplies = pre-tax price of the sales + sales tax amount

                                                                  =$48 + $3.36

                                                                  =$51.36

6 0
3 years ago
Reagan will use a random number generator 1,200 times. Each result will be a digit from 1 to 6. Which statement best predicts ho
Stolb23 [73]

The answer is B.

The only reason it will be 200 is because the numbers 1,2,3,4,5,and 6 are all an option so the probability of 5 is 1/6 and if you multiply 1/6 by 1,200 you will get 200. Hope this helped!

5 0
3 years ago
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