Answer:
22.4
Step-by-step explanation:
using altitude theorem, the height of the triangle is 20
let y = height
10/y = y/40
y² = 400
y = 
or 20
Now we can us the Pythagorean Theorem to find 'x':
10² + 20² = x²
100 + 400 = x²
x=
≈ 22.4
Answer:
150.72 units³
Step-by-step explanation:
volume = πr²h
= 3.14×4²×3
= 150.72
Answer:
Scientific notation is a way of writing long numbers, often with a lot of zeros, in a shorter and easier to read format.
Step-by-step explanation:
As an example I will use 360
first move the decimal so the number is larger than one but less than ten
So the number will be 3.60
to make it equal to 360 it would be 3.6 x 10^2 multiplying 3.6 by 10 to the power of 2 will make it 360. for a more in depth and probably better explination I would check khan academy.
Answer:
B. 68 inches
Step-by-step explanation:
H-------J-------K
you know that HJ is 56, and JK is 2/9 × HJ.
2/9 × 56 = 12.4
you now know HJ and JK, so HK is the sum of those.
12.4 + 56 = 68.4
so HK ≅ 68 when you round the answer
Answer:
48+14i
Step-by-step explanation:
So squaring (i+7) looks like this
(i+7)^2
(i+7)(i+7)
Use foil.
First: i(i)=i^2=-1
Outer: i(7)=7i
Inner: 7(i)=7i
Last: 7(7)=49
____________Add the terms.
48+14i
