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3 years ago

If someone could please answer this question I would really appreciate it!

Mathematics

1 answer:

sleet_krkn [62]3 years ago

3 0

Abc is congruent to def
also is congruent to pqr

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A triangular pyramid has a base with an area of 21.8 square meters, and lateral faces with bases of 7.1 meters and heights of 9

Ymorist [56]

Answer:

Step-by-step explanation:

A triangular pyramid has a base with an area of 21.8 square meters, and lateral faces with bases of 7.1 meters and heights of 9 meters. Enter an expression that can be used to find the surface area of the triangular pyramid.

The expression is written as:

Surface Area = Area of the base + 1/2( Perimeter × Slant height)

8 0

3 years ago

A circular swimming pool has a radius of 28 feet. There is a path way all the way around the pool that is 4 foot wide. A fence i

Advocard [28]

Answer:

about 201 ft of fencing

Step-by-step explanation:

Including the path the radius would be 32 ft. and the diameter is 64 ft.

C = πd where C is the circumference and d is the diameter.

So, C ≅ 3.14(64) ≅ 201 ft.

5 0

3 years ago

At the start of 2014, tim house was worth £100,000 the value of the house increases by 10%per every year work out the value of h

kotykmax [81]

Answer:

$146410

Step-by-step explanation:

The formula for calculating future value:

FV = P (1 + r)^n

FV = Future value

P = Present value

R = interest rate

N = number of years

100,000 x (1.1)^4 = $146410

4 0

3 years ago

Awnser this please i will give you 16

Aleks04 [339]

Answer:

Its EFBGCAHDI

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3 years ago

The principal at Riverside High School would like to estimate the mean length of time each day that it takes all the buses to ar

Lilit [14]

Answer:

C) 11

Step-by-step explanation:

1) Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

$\bar X$ represent the sample mean for the sample

$\mu$ population mean (variable of interest)

s represent the sample standard deviation

n represent the sample size

Since the Confidence is 0.90 or 90%, the value of $\alpha=0.1$ and $\alpha/2 =0.05$ , and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-NORM.INV(0.05,0,1)".And we see that $z_{\alpha/2}=1.64$