Tom--------------
>10 sq ft per minute
Tim-------------------
>3.5*10=35 sq ft per minute
Both painters (10+35)=45
sq ft per minute
let's assume a cubic unit crate----------> V1=1*1*1=1 feet3
<span>the total surface of the cube is S1=6*(1*1)=6 </span>sq
ft
if the volume of the cube increases twice
V2=2 feet3 ------------------- > 2=x*x*x------------- >x=2^(1/3)
And the S2=6*(2^(1/3)*<span> 2</span>^(1/3)=9.5244 sq ft
V2/V1=9.5244/6=1.5874
Therefore
If Tim and Tom-----------------------
> take 1 day----------- > to paint a crate V1
For the crate V2------------- > take 1.5874 days
assuming an 8-hour work day
0.5874*8=4.70 hr-------------- > 4 h 42 min
The answer is 1 day 4h 42 min
B 12:3 = 4-1=3 C 10- 7=3 And A 2+15x=x=15-2=13
Answer:
sinѲ = -1/√5 or -√5/5
Step-by-step explanation:
On the Cartesian plane, we have radius (r) and angle (Ѳ) theta.
On the Cartesian plane we also have x, y where:
x = r cosѲ .......Equation 1
and y = r sinѲ ........Equation 2
r = √x² + y²
In the question we are given points (2,-1)
Where x = 2 , y = -1
We would solve for r by substituting 2 for x and -1 for y
r = √ 2² + -1²
r = √ 4 + 1
r = √5
In the question, we were asked to find what sin theta (Ѳ) is. Hence, we would be substituting √5 for r in Equation 2
y = r sinѲ
Where y = -1 and r = √5
-1 = √5 sinѲ
Divide both sides by √5
sinѲ = -1/√5
We can also represent sin Ѳ in a proper form, by multiplying both top and bottom by √5
sinѲ = -√5/5
Therefore, sinѲ = -1/√5 of -√5/5
Answer:
Step-by-step explanation:
answer is 3
The attached figure represents the cardboard (10inches by 12 inches) and the squares that should be cut to make the box.
let the length of the square = x
So , the length of the box = L = 12 - 2x
the width of the box = W = 10 - 2x
And, the area = L * W = 80 ⇒(given)
∴ L * W = (12-2x)(10-2x) = 80
∴ (12 - 2x)(10-2x) =80
4x² - 44x + 120 = 80 ⇒ multiply the brackets
4x² - 44x +120 - 80 = 0 ⇒ make all variables in one side
4x² - 44x + 40 = 0 ⇒ sum the similar
x² - 11x +10 = 0 ⇒ solve by analysis
(x-1)(x-10) = 0
∴ x = 10 (rejected because the cardboard length = 10 inch)
OR x = 1
∴ the size of the square should be cut from each corner = 1 inch by 1 inch