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Stels [109]
3 years ago
7

Please help with this question.

Mathematics
1 answer:
Anit [1.1K]3 years ago
4 0
The equation is

Area of a triangle = (1/2) · (base) · (height)

Plug in the numbers given in the question:

52 square inches = (1/2) · 
(base) · (13 inches)

Divide each side by (13 inches):

4 inches = (1/2) · (base)


Multiply each side by  2  :

8 inches = base
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Find f(3) if<br> f(x)=x^3 + 2x^2-x-1
Wittaler [7]

Answer:

\underline{ \boxed{f(3) = 41}}

Step-by-step explanation:

if \to \: f(x)=x^3 + 2x^2-x-1 \\ then \: f(3) =  {3}^{3}  + 2( {3)}^{2}  - 3 - 1 \\ f(3) = 27 + 18 - 4 \\ f(3) = 41

4 0
3 years ago
Water use in the summer is normally distributed with a mean of 311.4 million gallons per day and a standard deviation of 40 mill
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Step-by-step explanation:

Given : Water use in the summer is normally distributed with

\mu=311.4\text{ million gallons per day}

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Z-score : \dfrac{x-\mu}{\sigma}

\dfrac{350-311.4}{40}=0.965

Now, the probability that a day requires more water than is stored in city reservoirs is given by:-

P(x>350)=P(z>0.965)=1-P(z

We can see that on comparing the above value to the given P(X > 350)= 1 - P(Z < b) , we get the value of b is 0.965.

4 0
3 years ago
A square piece of paper 160 mm on a side is folded in half along a diagonal. The result is a 45° – 45° – 90° triangle. What is t
posledela
A^2+b^2=c^2

160^2+160^2 = 51,200

Square root of that is <span>226.27416998</span>
6 0
3 years ago
Karen used one-third of her total stamps on a campaign for charity. Karen used 60 stamps on the charity campaign.
UkoKoshka [18]
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