1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Juli2301 [7.4K]
3 years ago
8

Danielle built a ramp with a stopping block at the bottom for her scout troop’s pinewood derby. She wants to paint the top and s

ides of the ramp. Danielle calculated the area by adding the areas of 2 triangular faces and 3 rectangular faces from the ramp and 6 rectangular faces from the block.
Did Danielle calculate the area correctly? If not, what was her mistake?
A. Yes, Danielle calculated the area correctly.
B. No, Danielle needs to remove 1 rectangle from the ramp and 1 rectangle from the block.
C. No, Danielle needs to add 1 triangle to the ramp and remove 1 rectangle from the block.
D. No, Danielle needs to remove 1 triangle from the ramp and add 1 rectangle to the block.
Mathematics
2 answers:
Anvisha [2.4K]3 years ago
8 0
A correct, all number of sides are calculated correctly
DanielleElmas [232]3 years ago
5 0

Answer:

Actually its b).

Step-by-step explanation:

She only wants to paint the top and sides of the ramp therefore you will have to take off the bottom parts of the ramps aka b).

You might be interested in
The vertices of a triangle are labeled clockwise A(–5, 3), B(6, 1), and C(–2, –3). How could you show that the figure is a right
mafiozo [28]

Explanation:

When the points are plotted on a graph, it is easy to see that the slope of AC is -2 and the slope of BC is 1/2. These slope values have a product of -1, so the corresponding line segments are perpendicular to each other.

___

If you have studied vectors, you can find the dot product of AC with BC:

  AC = (-5, 3) -(-2, -3) = (-3, 6)

  BC = (6, 1) -(-2, -3) = (8, 4)

The dot product is ...

  (-3, 6)·(8, 4) = (-3)(8) + (6)(4) = -24+24 = 0

When the dot product of vectors is zero, they are perpendicular.

5 0
3 years ago
A snail can move 1/30 miles in 1/3 hour. How fast does a snail move in miles /hours
bekas [8.4K]

Answer:             1/10 miles/hour

To find how fast a snail moves in miles per hour, we can find the unit rate using a proportion.

<h2>Unit Rate</h2>

The unit rate is the amount per one unit. In this problem, the unit is for one hour. One way to find the unit rate is by using a proportion.

<h2>Proportions</h2>

Proportions look like two fractions set equal to each other with a missing variable to solve.

<h3>State our variables</h3>

let <em>x</em> be the number of miles per hour

<h3>Write a proportion</h3>

The first fraction has a number for the numerator (top) and denominator (bottom), because the question gives us the information. The second fraction has a missing value, <em>x</em>, that we are solving for. We can write <em>x</em> in the numerator.

\displaystyle{\frac{\frac{1}{30}\ mi}{\frac{1}{3}\ hr} = \frac{x\ mi}{1\ hr}}

<h2>Solve</h2>

We can solve by finding the scale factor. The scale factor is the number we can multiply the numerator by to find <em>x</em>.

<h3>Find the scale factor</h3>

Start with the proportion.

\displaystyle{\frac{\frac{1}{30}\ mi}{\frac{1}{3}\ hr} = \frac{x\ mi}{1\ hr}}

To find the scale factor,

  1. Take the denominator from the fraction with a variable: 1\ hr
  2. Take the denominator from the fraction that has no variable:  \frac{1}{3}\ hr
  3. Divide step 1 by step 2 and solve:  1\ hr\ \div\ \frac{1}{3}\ hr = 3

Our scale factor is <u>3</u>.

<h3>Solve for x</h3>

We can find <em>x</em> by multiplying the numerator in the first fraction by the scale factor. This is because <em>x</em> is also in the numerator.

\displaystyle{\frac{\frac{1}{30}\ mi}{\frac{1}{3}\ hr} = \frac{(\frac{1}{30}\ mi)*3}{1\ hr}}

\displaystyle{\frac{\frac{1}{30}\ mi}{\frac{1}{3}\ hr} = \frac{\frac{3}{30}\ mi}{1\ hr}}

Simplify 3/30 by dividing the fraction by 3.

\displaystyle{\frac{\frac{1}{30}\ mi}{\frac{1}{3}\ hr} = \frac{\frac{1}{10}\ mi}{1\ hr}}

x = 1/10

∴ a snail moves 1/10 miles per hour.

Learn another way to solve proportions here: brainly.com/question/18437927

7 0
2 years ago
On a piece of paper, draw a box plot to represent the data below. Then determine which answer choice matches the box plot you dr
earnstyle [38]

Answer:

The answers A

Step-by-step explanation:

A has 22, the lowest number, 28, the third lowest number, 42, the middle number, 56, the third highest number, and 61 the highest number!

8 0
3 years ago
Find the value of each variable in the parallelogram. Round your answers to the nearest tenth, if necessary.
lilavasa [31]

Answer:

z = 2

y = 5

Step-by-step explanation:

3 0
2 years ago
A teacher wrote the numbers 10 ,-2, 4, 3, -1, -7 ,1 on a white board.the teacher asked which number should she write in order to
storchak [24]
Let x be that number:

x +10 -2 +4 + 3 - 1 - 7 +1 = 0

 x +8 = 0

and x = - 8

3 0
3 years ago
Other questions:
  • The number n(t) of people in a community who are exposed to a particular advertisement is governed by the logistic equation. ini
    7·1 answer
  • Please help !!!!!!!!!!!!!
    7·1 answer
  • If GH is the angle bisector of FGI, which statement about the angle is true
    11·2 answers
  • How much money left after spending $8, $7 and $13, then received $10 and spent $15. now $12 is left. how much money did one have
    13·1 answer
  • Jeff began deriving the quadratic formula.
    5·1 answer
  • Im really confused i hope this doesnt take to much time please help it would me so much to me.
    11·1 answer
  • Sin y+ cos y + tan y sin y=sec y+ cos y tan y?
    7·1 answer
  • Write a polynomial that represents the shaded area of the figure below
    12·1 answer
  • How many solutions does the equation 2(9x-6)=18x+2 have??? Please help
    9·1 answer
  • What is the answer to this along with steps to doing it?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!