All categories

2 years ago

Pls solve find the area shaded part all 3

Mathematics

1 answer:

aleksklad [387]2 years ago

5 0

Answer:

below explained briefly

Step-by-step explanation:

(a) to find the area of parallelogram use the formula:<em> b * h</em> = 30 * 20 = 600m^2

(b) <u>to find the area of shaded of this one: first we need to find the area of rectangle and then area of two triangle and subtract them with rectangle.</u>

area of rectangle : <em>length * width</em> = 25 * 7 = 175 cm^2

area of two triangles = 2<em>(1/2*b*h)</em> = 2 ( 1/2 * 7 * 5 ) = 35 cm^2

area of shaded = 175 - 35 = 140 cm^2

<u>one of the famous methods are that we know it a equilateral triangle thus all sides are 60 degree</u>

<em>formula : 1/2 * a * b * sin(C)</em>

using this formula : 1/2 * 8 * 8 * sin( 60 )

: 27.7 cm^2

You might be interested in

Please answer this correctly

yanalaym [24]

22 is the answer to this math problem

8 0

3 years ago

While shopping Marcy spent $59. If the amount she spent is 25% of her savings, how much savings did she have before she shopped

aliya0001 [1]

Answer:

Savings= $236

Step-by-step explanation:

Giving the following information:

Money spent= $59

Proportion of savings= 25% = 0.25

<u>To calculate the total savings before shopping, we need to use the following formula:</u>

Savings= money spent / proportion of savings

Savings= 59 / 0.25

Savings= $236

7 0

3 years ago

The inverse of f(x)= x2 is also a function

Margaret [11]

<h2>Answer:</h2><h3>False</h3><h2>Step-by-step explanation:</h2>

The inverse is not a function because this function is not one-to-one, that is, a function $f$ has an inverse function if and only if there is no any horizontal line that intersects the graph of $f$ at more than one point, this is called the Horizontal Line Test for Inverse Functions. Thus, if you take an horizontal line it will pass through two points as indicated in the figure below. In conclusion, this function hasn't an inverse function.

3 0

3 years ago

Read 2 more answers

A bag of fertilizer weighs 20 pounds. The NPK content reads 12-24-4. What is the

Rudiy27

It would probably be A

6 0

2 years ago

A data set lists weights (lb) of plastic discarded by households. The highest weight is 5.31 lb, the mean of all of the weight

a_sh-v [17]

Answer:

a) The difference is of 3.222 lbs.

b) 1.64 standard deviations.

c) Z = 1.64

d) Not significant, as the z-score of 1.64 is between -2 and 2.

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the z-score 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 p-value, we get the probability that the value of the measure is greater than X.

The mean of all of the weights is x=2.088 lb, and the standard deviation of the weights is s=1.968 lb.

This means that $\mu = 2.088, \sigma = 1.968$

a. What is the difference between the weight of 5.31 lb and the mean of the weights?

This is $X - \mu = 5.31 - 2.088 = 3.222$

The difference is of 3.222 lbs.

b. How many standard deviations is that [the difference found in part (a)]?

This is the z-score. So

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

$Z = \frac{5.31 - 2.088}{1.968}$

$Z = 1.64$

1.64 standard deviations.

c. Convert the weight of 5.31 lb to a z score.

Z = 1.64, as found above.

d. If we consider weights that convert to z scores between −2 and 2 to be neither significantly low nor significantly high, is the weight of 5.31 lb significant?

Not significant, as the z-score of 1.64 is between -2 and 2.

5 0

3 years ago