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3 years ago

8

a pizza delivery shop averages 19 minutes per delivery with a standard deviation of 4 minutes. what is the probability that a pi

zza takes less than 15 minutes to be delivered

1 answer:

allochka39001 [22]3 years ago

6 0

15:23 hope this helps

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Please help with math problem

scoundrel [369]

Answer:

From least to greatest:

-2, 0.2, 1/2

Step-by-step explanation:

-2 is below 0. 0.2 is below 1/2 (0.5) and 0.5 is the highest.

6 0

2 years ago

HELP ASAP.....NO LINKS & NO TROLLING

AfilCa [17]

Answer:

C

This is the answer

$(x + 3)(5x + 2) \\ x = - 3 \: \: or \: \: x = - \frac{2}{5}$

4 0

2 years ago

Prove algebraically that r = 10/2+2sinTheta is a parabola

Xelga [282]

Answer:

$y = - \frac{ 1 }{10} {x}^{2} + \frac{5}{2}$

Step-by-step explanation:

We want to prove algebraically that:

$r = \frac{10}{2 + 2 \sin \theta}$

is a parabola.

We use the relations

${r}^{2} = {x}^{2} + {y}^{2}$

and

$y = r \sin \theta$

Before we substitute, let us rewrite the equation to get:

$r(2 + 2 \sin \theta) = 10$

Or

$r(1+ \sin \theta) = 5$

Expand :

$r+ r\sin \theta= 5$

We now substitute to get:

$\sqrt{ {x}^{2} + {y}^{2} } + y = 5$

This means that:

$\sqrt{ {x}^{2} + {y}^{2} }=5 - y$

Square:

${x}^{2} + {y}^{2} =(5 - y)^{2}$

Expand:

${x}^{2} + {y}^{2} =25 - 10y + {y}^{2}$

${x}^{2} =25 - 10y$

${x}^{2} - 25 = - 10y$

$y = - \frac{ {x}^{2} }{10} + \frac{5}{2}$

This is a parabola (0,2.5) and turns upside down.

4 0

2 years ago

Rebecca already knew 1 appetizer recipe before starting culinary school, and she will learn 3

Ostrovityanka [42]

Answer:

14 weeks

Step-by-step explanation:

so from what we know she already learned one appetizer recipe so she needs to learn 42 more so what we need to do since it's three every week we need to multiply three until we are able to get 42 so three times 14 gets 42 so that means that the answer would be 14

5 0

2 years ago

What is the volume of a right circular cone that has a height of 14.9 cm and a base with the circumference of 2.9 cm rounded to

xxMikexx [17]

Answer:

The answer to your question is Volume = 3.30 cm³

Step-by-step explanation:

Data

Volume = ?

height = 14.9 cm

circumference = 2.9 cm

Process

1.- Calculate the radius

circumference = 2πr

-Substitution

2.9 = 2πr

-Solve for r

r = 2.9/2π

r = 1.45/π cm

2) Calculate the volume of the cone

Volume = 1/3πr²h

-Substitution

Volume = 1/3π(1.45/π)²(14.9)

-Simplify

Volume = (1.04)(0.213)(14.9)

Volume = 3.30 cm³

5 0

2 years ago