Surface area = 4* pi * radius squared
radius is half the diameter
4 *3.14 * 2^2 = 50.27
Step-by-step explanation:
a)2×30=60J
b) 1.25×0.28 = 0.35J
Answer:
a. 1.91
Step-by-step explanation:
because I think I'm lucky today
Answer:
x = 3.6
Step-by-step explanation:
3/5 = x/6
multiply both sides by 6
18/5 = x
as a decimal
x = 3.6
Answer:
y = 2
x = 5
Step-by-step explanation:
4x + 5y = 10 | ×3 |
3x - 3y = 21 | ×4 |
12x + 15y = 30
12x - 12y = 84
____________--
27y = -54
y = -54/27
y = 2
4x + 5y = 10 | ×3 |
3x - 3y = 21 | ×5 |
12x + 15y = 30
15x - 15y = 105
____________+
27x = 135
x = 135/27
x = 5