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3 years ago

A set of stairs is being built as shown.

Mathematics

2 answers:

Oduvanchick [21]3 years ago

7 0

a squared + b squared = c squared

The answer is 7 inches

Sergio [31]3 years ago

5 0

Step-by-step explanation:

using Pythagoras a²+b²=c²

HOWEVER you know the hypotenuse

so it's rearranged to either c²-b²=a² or c²-a²=b²

so 13²-11²

so 169-121

this makes 48

square root 48 is 6.90 inches

this rounds up to 7 Inches

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Solve for x in parts below:

Luden [163]

Answer:

x=30°

Step-by-step explanation:

50 + x =80 degree (sum of two interior opposite angles is equal to the exterior angles formed)

x=80-50

x=30 degree

8 0

3 years ago

Read 2 more answers

If every day I make 2 dollars and every time I reach 50 dollars it adds 25 cents to my daily income how many days will it take f

Vsevolod [243]

9514 1404 393

Answer:

659

Step-by-step explanation:

We assume the daily rate increases at each multiple of $50. When the balance reaches $50 on day 25, the pay on day 26 is $2.25.

Similarly, when the balance reaches 9628.75 on day 658, the pay will be $50 on day 659.

I found this easiest to solve using a computer program. A spreadsheet can do it by computing the number of days between raises. This is shown in the attachment.

3 0

3 years ago

The average score of all pro golfers for a particular course has a mean of 70 and a standard deviation of 3.0 (Think of these as

bija089 [108]

Answer:

0.477 is the probability that the average score of the 36 golfers was between 70 and 71.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 70

Standard Deviation, σ = 3

Sample size, n = 36

Let the average score of all pro golfers follow a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

P(score of the 36 golfers was between 70 and 71)

$\text{Standard error of sampling} = \displaystyle\frac{\sigma}{\sqrt{n}} = \frac{3}{\sqrt{36}} = \frac{1}{2}$

$P(70 \leq x \leq 71) = P(\displaystyle\frac{70 - 70}{\frac{3}{\sqrt{36}}} \leq z \leq \displaystyle\frac{71-70}{\frac{3}{\sqrt{36}}}) = P(0 \leq z \leq 2)\\\\= P(z \leq 2) - P(z \leq 0)\\= 0.977 - 0.500 = 0.477= 47.7\%$

$P(70 \leq x \leq 71) = 47.7\%$

0.477 is the probability that the average score of the 36 golfers was between 70 and 71.

8 0

4 years ago

PLEASE HELP ASAPPPPPPPP

serious [3.7K]

1) she got enought for the movie
2) she got enough for the snacks
3) in total she had $39.75 and she spent minus what she spent in the mall, she had a total of $15.04 cents before going to the movies

3 0

4 years ago

Your baseball team has won 6 game and lost 4 game.If the the team dosen;t lose anymore games how many games must the team win to

ZanzabumX [31]

Answer: 2 more games

Step-by-step explanation:

From the question, we are informed that a baseball team has won 6 game and lost 4 game.

We are further told that the team dosent lose anymore games and want to know the number of games they must win to have a ratio of 2:1.

Since they have lost 4 games and need a ratio of 2:1. This means we have to multiply the game lost by 2. This will be: = 4 × 2 = 8 games.

Since they've won 6 games already, they'll need to win = 8 - 6 = 2 games more.

4 0

3 years ago