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Setler [38]
3 years ago
6

melissa and angie baked 15 pies for the bake sale on Pi day and were suprised when they sold every piece for $2.25 each. If thei

r ingredients were $15.24 for all pies and each pie was cut into six slices, How much profit did the girls make in the bake sale?
Mathematics
1 answer:
STALIN [3.7K]3 years ago
3 0

$18.51 would be the correct answer!

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Ten samples of coal from a northern appalachian source had an average mercury content of 0.242 ppm with a standard deviation of
Dovator [93]
The confidence interval is from 0.2191 to 0.2649, given by

0.242\pm0.0229.

The z-score we need is found by first subtracting the confidence level from 1:
1 - 0.95 = 0.05

Divide that by 2:
0.05/2 = 0.025

Subtract that from 1:
1 - 0.025 = 0.975

Look this up in the middle of a z-table (http://www.z-table.com) and we see that the z-score is 1.96.

Now our confidence interval is given by
\overline{x} \pm z\times \frac{\sigma}{\sqrt{n}}
\\
\\0.242\pm 1.96 \times (\frac{0.037}{\sqrt{10}})
\\
\\0.242 \pm .0229
\\
\\0.242-0.0229=0.2191
\\
\\0.242+0.0229 = 0.2649
5 0
3 years ago
Jasmine created this spinner to predict whether a randomly selected student in her school will be traveling during the upcoming
riadik2000 [5.3K]

Answer: 9

Step-by-step explanation:

There are 8 equal sections which are meant to reflect the data Jasmine collected from surveying the students.

This means that each section represents;

= 36/8

= 4.5 students.

There are 2 sections that represent the number of students who said they would be traveling during the holiday break.

= 4.5 * 2

= 9 students

4 0
2 years ago
Read 2 more answers
Find all solutions to the equation:
crimeas [40]

Let z = sin(x). This means z^2 = (sin(x))^2 = sin^2(x). This allows us to go from the equation you're given to this equation: 7z^2 - 14z + 2 = -5

That turns into 7z^2 - 14z + 7 = 0 after adding 5 to both sides. Use the quadratic formula to solve for z. The only solution is z = 1 (see attached image). Since we made z = sin(x), this means sin(x) = 1. All solutions to this equation will be in the form x = (pi/2) + 2pi*n, which is the radian form of the solution set. If you need the degree form, then it would be x = 90 + 360*n

The 2pi*n (or 360*n) part ensures we get every angle coterminal to pi/2 radians (90 degrees), which captures the entire solution set.

Note: The variable n can be any integer.

7 0
3 years ago
6 in 7 21 in 14 in 8 in​
yulyashka [42]
I think this is find the LCM, so the answer would be 168
8 0
3 years ago
7w-180=52w what does w equal
BartSMP [9]

Answer: w= -4

Step-by-step explanation:

7w-180=52w

Subtract 7w on both sides.

-180=45w

Divide both sides by 45.

-4=w

4 0
3 years ago
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