Answer:
a. 754cm³ (3 s.f.)
b. 415cm² (3 s.f.)
Step-by-step explanation:
Formulas (for easier reference):
Volume of cone: r²
Volume of hemisphere: r³
Surface area of cone without base: rl
Surface area of hemisphere without base: 2r²
We can just apply the formulas for the question:
Volume of toy = ( × 6² × ) + ( × 6³)
= 96 + 144
= 240
= 754cm³ (3 s.f.)
Surface area of toy = ( × 6 × 10) + (2 × × 6²)
= 60 + 72
= 132
= 415cm² (3 s.f.)
Answer:
4x+9=x+15
x = 2
Step-by-step explanation:
Let's solve this equation I just made:
4x + 9 = x + 15
Subtract 9 from each side:
4x = x + 6
Subtract x from each side:
3x = 6
Divide each side by 3:
x = 2
It is 1/18.
They are getting one slice of the whole 18 slices.
Answer: that contains a high concentration of dissolved salts (mainly sodium chloride.
Step-by-step explanation:
Answer:
16
Step-by-step explanation:
you replace the letter with the number given to replace them. So, in the equation you replace the letter C with -1, as it tell you on the side. You do the same with F, but with 3. your equation should look like: 7(-1 + 5) - 3 × 4. you then solve from there and should get 16. I hope this is right, if not my bad