I need help i don't understand

Answers

Answer 1

Answer:

I'm pretty sure it's 25 sq units

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What is the approximate circumference of a circle with a radius of 42.1 km? A. 5565.4 km
B. 1391.3 km
C. 264.4 km
D. 132.2 km

Answers

c.264.4 that should answer your question

Circumference of circle = 2*pi*r
= 2*22/7*42.1
= 264.4 km

Therefore, the circumference of the circle is 264.4 km

One circular table has a diameter of 9ft, and another circular table has a diameter of 14ft. How much greater is the area of the larger table? round to the nearest whole number.

Answers

$Area \ of \ a \ Circle : \n \nA= \pi r^2 \n \n diameter : \ d_(1)= 9 \ ft \n radius : r_(1) =(d_(1))/(2)=(9)/(2)=4.5 \ ft \n \n d_(2)= 14 \ ft \n radius : r_(2) =(d_(1))/(2) =(14)/(2)=7 \ ft \n \nA_(1)= (4.5)^2 \pi=20,25 \ cdot 3.14 = 63.585 \ ft^2 \n \nA_(2)= 7^2 \pi=49 \cdot 3.14 = 153.86 \ ft^2 \n \n A_(2)-A_(1)= 153.86 - 63.585 = 90.275 \approx 90 \ ft^2$

Area of circle= πr²
r-radius

A1-area of table with diameter 9ft
A2-area of circle with diameter 14ft
d=2r

A1=π*(4,5)²=20,25π
A2=π*7²=49π

A2-A1=49π-20,25π=28,75π=90,275≈90ft²

Equivalent ratios 78:100 to 39:50

Answers

Well, they are equivalent, but I'm not sure if that's exactly what you're asking. :)

How do you find the maximum or minimum of g(x) = 2x^2 + 12x +14

Answers

this is what I got for it lmk if u have any more questions

How many unique triangles can be made where one angle measures 60 and another angle is obtuse

Answers

Hello,

An infinite triangles may be constructed
You choice 2 points A and B.
Draw a angle of 60°
Take the perpendicular from B on [AC) (half line) Every point outside [AH] on [AC) give an obtused triangle.

Answer:

its 15 which is more than 2 so your answer is c

Step-by-step explanation:

Need help with this please quick

Answers

okay so $55.00-$1.10=$54.10

About 85. 1.10 × 31 = 34.1. 55 + 34.1 = 89.1 ≈ 89 ≈ 85

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