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Inessa [10]
4 years ago
8

How to solve this problem.

Mathematics
1 answer:
andreyandreev [35.5K]4 years ago
7 0
Notice the picture below

now, if the arc "x" is 48°, and the arc across the circle is also 48°, then those chords are congruent, notice the chords in red

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A wakeboard ramp has a rise of 3 feet and a run of 8 feet, what is the slope of the ramp? the slope of the wakeboard in our exam
larisa [96]

Answer:

3/8

Step-by-step explanation:

slope = rise/run = 3/8

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It should look like how you would feel comfortable.

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8 0
3 years ago
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In a survey, 27 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped
tatiyna

Answer: (29.4, 32.6)

Step-by-step explanation:

From the question, we know that

Sample size (n) = 27

Sample mean (x) = $31

Sample standard deviation (s) = $3

We are to construct a 99% confidence interval interval for average amount spent on gift.

The formulae for constructing a 99% confidence interval for population mean is given as

u = x + tα/2 × s/√n...... For upper limit

u = x - tα/2 × s/√n...... For lower limit

tα/2 is the critical value for a 2 tailed test. This value of gotten from a t distribution table by checking the degree of freedom ( 27 - 1 = 26) against the level of significance ( 100% - 99% = 1%).

Hence tα/2 = 2.779

Let us substitute our parameters and solve

For lower limit

u = 31 - 2.779 × 3/√27

u = 31 - 2.779 ( 0.5773)

u = 31 - 1.6045

u = 29.4

For upper limit

u = 31 + 2.779 × 3/√27

u = 31 + 2.779 ( 0.5773)

u = 31 + 1.6045

u = 32.6

Hence the 99% confidence interval for population mean is given as 29.4, 32.6

6 0
3 years ago
Read 2 more answers
1. A box of 80 coins, consisting of only nickels and dimes, is worth 7 dollars and 80 cents. Find the number of nickels.
RideAnS [48]

Answer:

  1. 4 nickels
  2. 60 mph

Step-by-step explanation:

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2. The total of the two speeds is the rate of closure: (420 mi)/(4 h) = 105 mi/h. The speed of the second car is found by subtracting the speed of the first car from this total:

  105 mph - 45 mph = 60 mph

5 0
3 years ago
Answer plz!<br> Which choices are equivalent to the quotient below? Check all that apply.
Reika [66]
E and C are correct. Although E is the simplified answer
7 0
3 years ago
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