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trapecia [35]
3 years ago
12

What is the equation of the parabola?​

Mathematics
1 answer:
Novay_Z [31]3 years ago
3 0

Answer:

The simplest equation for a parabola is y = x^2

You might be interested in
The probability of getting a 4- bedroom home with a open porch based off the table.
AleksandrR [38]
All you have to do is multiply 1/3 (the chance of getting a 4 bedroom home) times 1/2 (the chance of getting an open porch). The answer is a 1/6 chance, as you don’t have to do anything with the kitchens because the question doesn’t specify to.

Hope this helps!
4 0
3 years ago
In a survey, 11 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped
pickupchik [31]

Answer:

The population standard deviation is not known.

90% Confidence interval by T₁₀-distribution: (38.3, 53.7).

Step-by-step explanation:

The "standard deviation" of $14 comes from a survey. In other words, the true population standard deviation is not known, and the $14 here is an estimate. Thus, find the confidence interval with the Student t-distribution. The sample size is 11. The degree of freedom is thus 11 - 1 = 10.

Start by finding 1/2 the width of this confidence interval. The confidence level of this interval is 90%. In other words, the area under the bell curve within this interval is 0.90. However, this curve is symmetric. As a result,

  • The area to the left of the lower end of the interval shall be 1/2 \cdot (1 - 0.90)= 0.05.
  • The area to the left of the upper end of the interval shall be 0.05 + 0.90 = 0.95.

Look up the t-score of the upper end on an inverse t-table. Focus on the entry with

  • a degree of freedom of 10, and
  • a cumulative probability of 0.95.

t \approx 1.812.

This value can also be found with technology.

The formula for 1/2 the width of a confidence interval where standard deviation is unknown (only an estimate) is:

\displaystyle t \cdot \frac{s_{n-1}}{\sqrt{n}},

where

  • t is the t-score at the upper end of the interval,
  • s_{n-1} is the unbiased estimate for the standard deviation, and
  • n is the sample size.

For this confidence interval:

  • t \approx 1.812,
  • s_{n-1} = 14, and
  • n = 11.

Hence the width of the 90% confidence interval is

\displaystyle 1.812 \times \frac{14}{\sqrt{10}} \approx 7.65.

The confidence interval is centered at the unbiased estimate of the population mean. The 90% confidence interval will be approximately:

(38.3, 53.7).

5 0
3 years ago
9-12r>-99 and -2r-4<-12
Umnica [9.8K]
Hello there!

9 - 12r > -99
-12r > -108
r \leq 9 is your first inequality.

-2r - 4 < -12
-2r < -8
r \geq 4 is your second inequality.

I hope this helps!
3 0
3 years ago
6. A sporting goods store is featuring several new
kirill115 [55]

Answer:

No

Step-by-step explanation:

The Ad is incorrect. They advertised that the prices of their bicycles is under$400, but the prices are $300, $250, $325, $780, and $350. $780 is more than $400. So the advertisement is not correct

3 0
3 years ago
The area of a triangle is one-half times the base times the height. If the area of a
dsp73

Answer:

The base is 90 sq

Step-by-step explanation:

Formula for Area= 1/2*b*h

where b is unknown and area = 54sq

<h2>Placing in formula</h2>

1/2 *b*12 = 54sq

12b = 54*2

12b /12 = 54*2/12

b = 9sq

5 0
3 years ago
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