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ella [17]
3 years ago
6

find the surface area of the composite solid round your answer to the nearest tenth and explain your answer

Mathematics
2 answers:
OlgaM077 [116]3 years ago
7 0
I did most of it for you-
Volume of the cone is 13.1
Volume of the cylinder is 18.9
Now, you just subtract two of the flat circular surfaces, because the two shapes are attached, therefore those parts are not surface area. And there is your answer.
aleksandrvk [35]3 years ago
4 0
The surface area is calculated based on the surfaces which are visible from the outside. In this case, you only need to calculate the surface of lateral side on the cone, the surface of lateral side on the cylinder, and the circle on the lower base of cylinder.

Write the expression to find the surface area
sa = lateral side of cone + lateral side of cylinder + circle
sa = (π × r × s) + (2 × π × r × t) + (π × r²)

Input the numbers
sa = (π × 1 × 3) + (2 × π × 1 × 2) + (π × 1²)
sa = 3π + 4π + π
sa = 8π
sa = 8 × 3.14
sa = 25.12

to the nearest tenth
sa = 25.1

The surface area of the composite solid round is 25.1 m²
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1/2log25-2log3+log8​
Schach [20]

Answer:

log base 10 of 40/9, log(40/9), or 0.6478

Step-by-step explanation:

Easiest and fastest way to do this is to plug it into the calc because the log base 10 of those numbers given will be nasty decimals.

4 0
4 years ago
David requires at least $300 to hold his birthday party. If David can save $63 a month, how many months will he need to save to
Darya [45]

Answer:

a. 63x \geq 300

b. x \geq 4.76 or x\geq 5

c. For David to achieve three hundred dollars, he would have to save approximately 5 months

Step-by-step explanation:

A. David requires three hundred dollars, this is his goal, indicating the three hundred must be alone. For the inequality sign, the statement says that he "requires at least $300", meaning that he would have to maintain three hundred dollars or his amount could go greater than $300. Therefore, the inequality sign should be "≥" or "greater than or equal to". We also know that David can save 63 dollars per month, meaning that there should be a variable next to 63 so we could replace "x" with any number to solve our inequality. This should leave us with the following inequality :

63x ≥ 300

B. To solve the inequality, we need to get x alone, to do so, divide 63 by both sides,

\frac{63x}{63} \geq \frac{300}{63}

x \geq  4.76

To make it easier, we can round "4.76" to 5.

x \geq 5

C. Already shown in the answer spot

4 0
3 years ago
No question but can you help me with Finding PI lol I don’t really get it. I will mark brainliest 60 points 30 for each person t
Brut [27]

Answer:

Make sure you are using a perfect circle. This method won't work with ellipses, ovals or anything but a real circle. A circle is defined as all the points on a plane that are an equal distance from a single center point. The lids of jars are good household objects to use for this exercise.You should be able to calculate pi roughly because in order to get exact results of pi, you will need to ...

Measure the circumference of a circle as accurately as you can. The circumference is the length that goes around the entire edge of the circle. Since the circumference is round, it can be difficult to measure (that's why pi is so important). Lay a string over the circle as closely as you can. Mark the string off where it circles back around, and then measure the string length with a ruler.

Measure the diameter of the circle. The diameter runs from one side of the circle to the other through the circle's center point.

Use the formula. The circumference of a circle is found with the formula C= π*d = 2*π*r. Thus pi equals a circle's circumference divided by its diameter. Plug your numbers into a calculator: the result should be roughly 3.14.[3] X Research source

Repeat this process with several different circles, and then average the results.

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Help mee please anyone
Likurg_2 [28]

Answer:

1.A - B

1.B - D

1.C - [unsure]

Step-by-step explanation:

5 0
2 years ago
Help please (let the pic load)
Dmitriy789 [7]
For question 13 ( operations ) you must do the brackets first, so you do 5+1 first which equals __ and then you divide the answer by 6.
3 0
4 years ago
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