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3 years ago

True Or False?

Mathematics

1 answer:

natali 33 [55]3 years ago

4 0

Electromagnets are devices that create a magnetic field through the application of electricity. Strong electromagnets are used to lift, move and drop heavy objects, such as vehicles. Electromagnets have advantages over permanent magnets. When the current is switched off, the electromagnet will lose its magnetism. The car will fall back to earth and we need that when we move cars in a junkyard. With a regular ( permanent ) magnet it would be much harder to do.
Answer: A. True

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The Spirit Team will be selling popcorn as a fundraiser at the next basketball game to earn funds to go to Orlando for a competi

Bogdan [553]

Answer:1 and 2

Step-by-step explanation:

Given

Volume needed $V=220\ in.^3$

For first cylinder

$r=3\ in.$

$h=4\ in.$

$V=\pi r^2h$

$V_1=\pi (3)^2(4)$

$V_1=113.11\ in^3$

For second cylinder

$r=4\ in.$

$h=4\ in.$

$V=\pi r^2h$

$V_2=\pi (4)^2(4)$

$V_2=201.08\ in^3$

For Third cylinder

$r=9\ in.$

$h=9\ in.$

$V=\pi r^2h$

$V_3=\pi (9)^2(9)$

$V_3=2290.51\ in^3$

For fourth cylinder

$r=4\ in.$

$h=9\ in.$

$V=\pi r^2h$

$V_4=\pi (4)^2(9)$

$V_4=452.448\ in^3$

So, cylinder $1$ and $2$ are appropriate as it is under $220\ in.^3$

3 0

3 years ago

What is the area of the triangle shown?

oee [108]

Answer:

Step-by-step explanation:

4 units x 3 units = 12 units / 2 to get a triangle

6 0

2 years ago

Read 2 more answers

What is x the missing side length in triangle DEF

larisa86 [58]

Answer:

x = 9.75

Step-by-step explanation:

We know that Triangle ABC and DEF are congruent, therefore;

$\frac{CB}{FE} = \frac{AB}{DE}$ <em />

$\frac{12}{9 }=\frac{13}{x}$

=> 12*x = 9*13

=> 12x = 117

=> x = 117 / 12

Hope this helps!

4 0

3 years ago

16. Tamara’s dosage of medication has recently decreased 20 milligrams per day. What is the total decrease in Tamara’s medicatio

8_murik_8 [283]

Number of days of the week = 7 days

Decrease rate of the dosage = 20 mg / day

Total decrease = number of days * decrease rate per day = 7 days * 20 mg / day

Total decrease = 140 mg.

Answer: total decrease in Tamara's medication ant the end of the week is 140 mg.

3 0

3 years ago

Factorize (x4+4) completely

kondor19780726 [428]

4(x+1) is factorized completely unless you are talking about quartics

7 0

3 years ago