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Nutka1998 [239]
3 years ago
6

Find the perimeter of each figure?

Mathematics
2 answers:
Levart [38]3 years ago
8 0
11- 59.1. Got the Answer for #11, but for #12 you lowkey should just use any type of calculator for that shape
inna [77]3 years ago
4 0

Answer:

11- 59.1 for the first one but cant help on the second sorry

Step-by-step explanation:

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PLEASE HELP
Fantom [35]

In step 3, Mark forgot to multiply 5 · 5, so he ended up with 5 in the denominator instead of 5 · 5 = 25

3 0
3 years ago
Task 1:
OleMash [197]

Answer:

maximum height is 4.058 metres

Time in air = 0.033 second

Step-by-step explanation:

Given that the equation height h

h = -212t^2 + 7t + 4

What is the toy's maximum height?

Let us assume that the equation is a perfect parabola

Time t at Maximum height will be

t = -b/2a

Where b = 7 and a = - 212

t = -7/ - 212 ×2

t = 7/ 424 = 0.0165s

Substitute t in the main equation

h = - 212(7/424)^2 + 7(7/424) + 4

h = - 0.05778 + 0.115567 + 4

h = 4.058 metres

Therefore the maximum height is 4.058 metres

How long is the toy in the air?​

The object will go up and return to the ground.

At ground level, h = 0

-212t^2 + 7t + 4 = 0

212t^2 - 7t - 4 = 0

You can factorize the above equation and pick the positive time t since time can't be negative

Or

Since we have assumed that it's a perfect parabola,

Total time in air = (-b/2a) × 2

Time in air = 0.0165 × 2 = 0.033 s

3 0
3 years ago
URGENT: Find two functions f(x) and g(x) such that f[g(x)] =x but g[f(x)] does not equal x.
Delvig [45]
I think it does equal x but not really fully sure
4 0
3 years ago
Heights of fourth graders are Normally distributed with a mean of 52 inches and a standard deviation of 3.5 inches. What percent
SVEN [57.7K]

Answer:

C. 59.01%

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 52, \sigma = 3.5

What percentage of fourth graders are between 50 inches and 56 inches?

This is the pvalue of Z when X = 56 subtracted by the pvalue of Z when X = 50.

X = 56

Z = \frac{X - \mu}{\sigma}

Z = \frac{56 - 52}{3.5}

Z = 1.14

Z = 1.14 has a pvalue of 0.8729

X = 50

Z = \frac{X - \mu}{\sigma}

Z = \frac{50 - 52}{3.5}

Z = -0.57

Z = -0.57 has a pvalue of 0.2843.

0.8729 - 0.2843 = 0.5886, which is close to 59.01%.

So the correct answer is:

C. 59.01%

7 0
3 years ago
The ratio of Ethan's football-playing time to Alex's football-playing time per day is 0.6: 2.5, and Alex plays football for 75 m
mariarad [96]

Answer:

Ethan plays football 18 minutes each day

Step-by-step explanation:

0.6 : 2.5

75/2.5=30

?/0.6=?

0.6 times 30 since you need then to be proportional

=18 minutes each day for ethan

4 0
3 years ago
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