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amid [387]
3 years ago
8

Brady recorded the number and color of cars in the parking lot. 45% of the cars in the parking lot were white. If Brady counted

a total of 81 white cars, how many cars did he count in the parking lot?
Mathematics
2 answers:
Nataly [62]3 years ago
6 0
180 sorry if I’m late to answer
elena-14-01-66 [18.8K]3 years ago
3 0

Answer:

180

Step-by-step explanation:

at45% is white and its 81 so i can tell 50% is 90 so I multiplied that by two and got 180

im in 6th grade

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This pyramid has the same base as the prism, and its height is three times the height of the prism. What is the ratio of the vol
solong [7]

Answer:

Option A is the correct answer.

Explanation:

 Let A be the base area and h be the height of prism.

 Volume of prism =  Base area x Height = a x h =ah

 Now we have base area of pyramid = Base area of prism = a ( both have same type of base)

Height of pyramid = 3 x height of prism = 3h

Volume of pyramid = 1/3 x Base area x Height = 1/3 x a x 3h = ah

Comparing both volumes, we will get Volume of prism = Volume of pyramid

So their ratio is 1.

Option A is the correct answer.

6 0
3 years ago
The base of a prism has n sides.
DaniilM [7]
A prism is a polyhedron comprising an n-sided polygonal base, a second base which is a translated copy (rigidly moved without rotation) of the first, and n other faces (necessarily all parallelograms) joining corresponding sides of the two bases (called lateral faces).
Hence:
1. if t<span>he base of a prism has n sides, then the prism has n lateral sides;
</span><span>
</span><span>2. by the definition, a prism has 2 equal bases and from the first part it has n lateral faces that together form n+2 faces.
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4 0
3 years ago
The graph of a sinusoidal function has a minimum point at (0, - 10) and then has a maximum point at (2, - 4) Write the formula o
AleksAgata [21]

Answer:   \bold{y=3sin\bigg(\dfrac{\pi}{2}x-\dfrac{\pi}{2}\bigg)-7}

<u>Step-by-step explanation:</u>

Minimum: (0, -10)

Maximum: (2, -4)

y = A sin (Bx - C) + D

  • Amplitude (A) = (Max - Min)/2
  • Period = 2π/B   →   B = 2π/Period
  • Phase Shift = C/B     →    C = B × Phase Shift
  • Midline (D) = (Max + Min)/2

A=\dfrac{-4-(-10)}{2}\quad =\dfrac{-4+10}{2}\quad =\dfrac{6}{2}\quad =\large\boxed{3}

\text{x-value of Max minus x-value of Min}= \dfrac{1}{2}\text{Period}\\\\2 - 0 = \dfrac{1}{2}P\quad \rightarrow \quad P=4\\\\\\B=\dfrac{2\pi}{P}\quad =\dfrac{2\pi}{4}\quad =\large\boxed{\dfrac{\pi}{2}}\\

D = \dfrac{\text{Max + Min}}{2}\quad = \dfrac{-4+(-10)}{2}\quad =\dfrac{-14}{2}\quad =\large\boxed{-7}

Sin usually starts at (0, 0).  For this graph, the midline touches 0 when x = 1 so the Phase Shift = 1.

C = B \times \text{Phase Shift}\quad = \dfrac{\pi}{2}\times 1\quad =\large\boxed{\dfrac{\pi}{2}}

A=3, \quad B=\dfrac{\pi}{2}, \quad C=\dfrac{\pi}{2},\quad D=-7\\\\\rightarrow \quad \large\boxed{y=3\sin \bigg(\dfrac{\pi}{2}x-\dfrac{\pi}{2}\bigg)-7}

3 0
2 years ago
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I would say the first one
5 0
3 years ago
Read 2 more answers
Fifty people were surveyed about their preference between chocolate and vanilla cake. The following two
GuDViN [60]

Answer:

TOTAL

Male

18

6

4

28

Female

15

5

2

22

TOTAL

33

November

6

50

In This sample, are the events "female" and "prefers chocolate" mutually exclusive

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
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