1 & 2) what are the surface areas? please explain.

Answers

Answer 1

Answer: To find the surface area of a cylinder, use the formula SA = 2(pi)(radius^2) + 2(pi)(radius)(height).

So now, plug in what you know.

SA = 2(3.14)(5^2) + 2(3.14)(5)(9)
SA = (6.28)(25) + (6.28)(45)
SA = 157 + 282.6
SA = 439.6 square cm

439.6 square cm is your surface area

Answer 2

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Helen bought 4 gallons of paint to redecorate her family room. If she uses 4/5 of the paint on the family room walls how much paint does Helen have left over ?
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In circle K , diameter CD is drawn and point E is located on the circle such that CE=16 and DE=30 .What is the length of the radius of circle K?

Answers

Answer:

The length of the radius of the circle K is $17\ units$

Step-by-step explanation:

we know that

The triangle CDE is a right triangle with the 90 degree angle at point E

Applying the Pythagoras Theorem

Find the length of CD (diameter of the circle K)

$CD^(2)=CE^(2)+DE^(2)$

substitute the values

$CD^(2)=16^(2)+30^(2)$

$CD^(2)=1,156$

$CD=34\ units$

Find the radius

Remember that the radius is half the diameter

$r=34/2=17\ units$

you have a coupon for an additional 25% off the price of any sale item at store. the store has put a robotics kit on sale for 15% off the original price of $40. what is the price of the robotics kits after both discounts?

Answers

The price of the robotics kits after both discounts is $25.5

What is a discount price?

The price at which something is sold, after reducing some amount from the regular price, is called discount price.

Given that, you have a coupon for an additional 25% off the price of any sale item at the store. the store has put a robotics kit on sale for 15% off the original price of $40.

Here, two discounts are given, at 25% and at 15%

Therefore, the selling price (price after the discounts) = 40x(100-25)/100x(100-15)/100

= 40x75/100x85/100

= 51/2

= 25.5

Hence, the price after the discounts is $25.5

For more references on discount price, click;

brainly.com/question/3541148

#SPJ1

Firstly we need to count how much is 15% from $40:

40 * 15% =
= 40 * 15/100 =
= 40 * 3/20 =
= 2 * 3/1 =
= 2 * 3 =
= 6 [dollars]

So the kit costed $40 - $6 = $34 after the first general discount. Now the question is if the coupon relates to the original price or to the lowered price. We'll do both:

If it relates to the original price, we need to find how much is 25% of $40. We can do it in mind - it's $10. So with two discounts the price would be $40 - $6 - $10 = $24.

However, if it relates to the lowered price, we need to find how much is 25% from $34:

34 * 25% =
= 34 * 25/100 =
= 34 * 1/4 =
= 8.5 [dollars]

So the final price in such a situation would be $40 - $6 - $8.5 = $25.5.

A 150 pound man burns 11.96 calories per minute whilerunning. He burns 4.5 calories per minute while walking.
He runs for x minutes and exercises for a total of 55
minutes. Write an equation to figure out how many
calories, C, he burns.

Answers

Answer:

Step-by-step explanation:

um it's really complicated but trust me it's 6

How to simplify 3t(t-5) + 6t 2

Answers

Answer: 3t^2-9t+2

Step-by-step explanation: im assuming you meant +2. First you need to distribute 3t^2-15t+6t+2 and then you need to combine like terms.

)Marcus painted one-third of his bedroom in fourth-fifths of an hour. At this rate, how long would it take him the paint the entire room?

Answers

It will take 2.4 hours to paint the entire room.

Given that,

Marcus painted one-third of his bedroom in the fourth-fifths of an hour.

We have to determine,

At this rate, how long would it take him the paint the entireroom?

According to the question,

The value of time would it take him the paint the entire room is determined by the unitary method.

Marcus painted one-third of his bedroom in the fourth-fifths of an hour.

$(1)/(3) \ part = (4)/(5) \ hour\n\n$

Then, The time is taken to paint the entire room is,

$= (4)/(5) * 3\n\n= (12)/(5)\n\n= 2.4 \ hours$

Hence, It will take 2.4 hours to paint the entire room.

To know more about Fractions click the link given below.

brainly.com/question/12431044

1/3 = 4/5
2/3 = 4/5
3/3 = 4/5
-----------------
12/5 = 2 and 2/5 of an hour

2 hours and 24 mins
(i hope so, check my work)

Need help with this question plz

Answers

Y should definitely get that phonw I ah eggs same but it’s red