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harina [27]
4 years ago
13

Everything just the first one, please. Asap, thanks in advance!

Mathematics
1 answer:
alekssr [168]4 years ago
7 0
Question number one is 2/3
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Dirk ordered a circular pizza that was 16 inches wide. If dirk ate a quarter of the pizza how many square inches of the pizza di
harkovskaia [24]
50.25
you have to find the area of the pizza first.
to do that you take half of the diameter 16
to get the radius 8
once you have the radius you square it 8*8 = 64
you than multiply it by pie 3.14
and get 200.95 or if you round 201
if you rounded you would get 50.25 if you didn't
than you would get. 50.24
3 0
3 years ago
Read 2 more answers
Dave has $13 to spend on an $8 book and two birthday cards for his friends. How much can he spend on each
Tju [1.3M]
He can spend $2.50 on each card. He starts with $13 and ends up with $5 after spending $8 on the book. Since he has 5 left and needs two cards, you divide 5 by 2 and ends up with $2.50. Hope this helps :)
3 0
4 years ago
The number of minutes taken for a chemical reaction if f(t,x). it depends on the temperature t degrees celcius, and the quantity
tatiyna
Hello,

Just for the fun, it's been a long time for that.

f(30,5)=50\\

f(t+3,x)=f(t,x)-5\ ==\textgreater \dfrac{f(t+3,x)-f(t,x)}{3}= -\frac{5}{3} \\

f(t,x+2)=f(t,x)-3\ ==\textgreater\dfrac{f(t,x+2)-f(t,x)}{2}= -\frac{3}{2} \\

f(t+\Delta t,\Delta x)=f(f,t)+ \dfrac{\partial{f(t,x)}}{\partial{t}} *\Delta t+ \dfrac{\partial{f(t,x)}}{\partial{x}} *\Delta x\\

f(33,4)\approx f(30,5)- \dfrac{5}{3} *3-\dfrac{3}{2}*(-1)= 50- 5+1.5=46.5\\




6 0
3 years ago
Pine Bluff Middle School is having its annual Spring Fling dance, which will cost $400. The student treasurer reported that the
Pavel [41]
4x + 75 > 400
( I meant to write the more than, equal to sign but I can't do that, so it shows as the more than sign, sorry about that.)
3 0
4 years ago
I’ll give 15 points.
yanalaym [24]
Both of the angles are 20 degrees (plz give me brainliest)
5 0
3 years ago
Read 2 more answers
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