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2 years ago

A square dinner napkin 8in. on each side is folded along its diagonal. Find the area of the folded napkin.

1 answer:

8 0

Since you need to find the area of a square napkin, you need to know what the formula for a square is. It is height multiplied by base. So a square is equal in all sides. 8×8=64
Answer: 64 in²

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PLEASE HELP!! A tennis ball machine serves a ball vertically into the air from a height of two feet, with an initial speed of 1

ch4aika [34]

Thank you for posting your question here. I hope the answer below will help.

Vo=110 feet per second
ho=2 feet 
So, h(t) = -16t^2 +110t +2 
Take the derivative: h'(t) = 110 -32t 
The maximum height will be at the inflection when the derivative crosses the x-axis aka when h'(t)=0. 
So, set h'(t)=0 and solve for t: 
0 = 110 -32t 
-110 = -32t 
t=3.4375 
t=3.44 seconds

4 0

2 years ago

Read 2 more answers

The number of column inches of classified advertisements appearing on Mondays in a certain daily newspaper is normally distribut

lana66690 [7]

Answer:

The probability there will be between 280 and 360 column inches of classified advertisement

P(280≤X≤360) = P(-2≤Z≤2) = 0.9544

Step-by-step explanation:

Step(i):-

Given that the mean the population = 320

The standard deviation of the Population = 20

Let 'X' be the random variable in a normal distribution

Let 'X' = 280

$Z = \frac{x-mean}{S.D} = \frac{280-320}{20} = -2$

Let 'X' = 360

$Z = \frac{x-mean}{S.D} = \frac{360-320}{20} = 2$

Step(iii):-

The probability there will be between 280 and 360 column inches of classified advertisement

P(280≤X≤360) = P(-2≤Z≤2)

= P(z≤2) -P(z≤-2)

= P(z≤2)+P(z≤2)

= 2P(z≤2)

= 2×0.4772 ( from normal table)

= 0.9544

6 0

2 years ago

What is the kinetic energy of an object of mass of 30 K moving with a speed of 15 M/S2

ale4655 [162]

You literally need to apply the formula

$K=\dfrac{1}{2}mv^2$

where $m$ is the mass and $v$ is the speed

5 0

3 years ago

I need help with number 2 and 3 I can't get this wrong and explain !!!!

mr_godi [17]

Because on number two there is a right angle and a part of it is 66 you subtract 66 from 90 and then divide that by 31 and subtract 7. Hope that helped a little

7 0

3 years ago

Read 2 more answers

Which algebraic expression is equivalent to the expression below?

JulijaS [17]

Step-by-step explanation:

7(4x + 9) - 4

= (7 × 4x) + (7 × 9) - 4

= 28x + 63 - 4

= 28x + 59

So, 7(4x + 9) - 4 is equivalent to 28x + 59 (D)

Hope it helpful and useful :)