Answer:
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Step-by-step explanation:
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Answer:
Step-by-step explanation:
http://www.mrbartonmaths.com/resources/GCSE%20Revision/GCSE%20Maths%20Takeaway/2.%20Grade%20D/46.pdf
You can find it in this site
Lets do the working for the amount of medication remaining in Noelle's body.
Day 1:
600 × 0.6 = 360
Day 3:
360 × 0.6 = 216
Day 4:
216 × 0.6 = 129.6
Day 5:
129.6 × 0.6 = 77.76
By the time Karey is taking the medication, Noelle only has 77.76 in her body.
This expressed as a percentage in relation to Karey's amount is :
77.76/600 × 100 = 12.96%
= 12.9%
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Answer:
343π
Step-by-step explanation:
To find the volume of a cone, we have to use this formula
× π × r² × h
Where 'r' is the radius and 'h' is the height
Let's start putting in the value's
We have diameter but in the formula we need the radius so we half the diameter to get the radius so 14 ÷ 2 = 7
× π × r² × h
× π × 7² × 21
→ Simplify the expression
× π × 49 × 21
→ Simplify it further
343π
The equation for this is ; y=1/2(x+4)^2-1
Explain
we use the vertex form
y=a(x-h)^2+k where the vertex is (h,k)
Select ( -4,-1)
Where h=-4
K=-1
y=a(x-h)^2+k
We get
y=a(x-(-4))^2+ -1
Y= a(x+4)^2+-1
Now replace to 0,7
7=a(0+4)^2-1
7=a(4)^2-1
7=16a-1
So now
7=16a-1
7+1=16a
8=16a
a=8/16
That should 1/2
So y=a(x+4)^2 -1
Should become
Y=1/2(x+4)^2 -1
Do you have any doubts now !