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Angelina_Jolie [31]
4 years ago
10

The elevation​ E, in​ meters, above sea level at which the boiling point of a certain liquid is t degrees Celsius is given by th

e function shown below. At what elevation is the boiling point 89.5degrees​? and 90degrees​?
E(t)= 1100(90-t)+520(90-t)^2
Mathematics
1 answer:
const2013 [10]4 years ago
3 0
For T = 89.5 degrees C:
E(t) = 1100(90 - 89.5) + 520(90 - 89.5)^2= 1100(0.5) + 520(0.5)^2= 550 + 130= 680 m
For T = 90 degrees C:
E(t) = 1100(90 - 90) + 520(90 - 90)^2= 0 + 0= 0 m (meaning that boiling point is 90 degrees C at ground level)

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Tom and Jerry make separate investments at the same time. Tom invests $2000 at an annual interest rate of 2% compounded continuo
kykrilka [37]

Answer:

Step-by-step explanation:

TOM / 6.02 years

~~~~~~~~~~~~~~~~~~~~~~

Tom: 2000(1.02)^15 =  $2,691.74  

Jerry: 1800(1.025)^15 =  $2,606.94

TOM has more money after 15 years...

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

6000 = 2000(1.02)^t

3=(1.02)^t

ln(3) = t * ln(1.02)

t = ln(3)/ln(1.2)

t = 6.02 years  

4 0
4 years ago
Fabian bought a bunch of fried chicken legs. 1/2 of the chicken legs cost $5.25. How much did he pay for all chicken legs
vaieri [72.5K]
He payed $2.625 for all chicken legs.
3 0
3 years ago
Hilary's house has a value of £180 000 correct to 2 significant figures.
Gemiola [76]

The least and highest value of the house before being rounded are £184999 and £175000 respectively.

The initial value of Sue's house before the increase is £205,000

£180,000 correct to 2 significant figures :

The greatest value of the house would be a sum in which the third significant figure is a value less than 5 and the succeeding values are highest

  • £184999

The least value of house would be a sum in which the third significant value is 5 and the succeeding values are lowest.

  • £175000

2.)

Let the price before the increase = p

  • Price after increase = £219350

7% of p = 219350

(1+7%) × p = 219350

1.07p = 219350

p = 219350 / 1.07

p = £205,000

Therefore, the price of the house before the increase is p = £205,000

Learn more : brainly.com/question/25338987

5 0
3 years ago
<img src="https://tex.z-dn.net/?f=x-%5Csqrt%7Bx%7D%20-2" id="TexFormula1" title="x-\sqrt{x} -2" alt="x-\sqrt{x} -2" align="absmi
Nata [24]

Answer:

(sqrt(x) +1)(sqrt(x)-2)

Step-by-step explanation:

x - 2 \sqrt{x}  +  \sqrt{x}  - 2 \\  \sqrt{x} ( \sqrt{x}  - 2) + 1( \sqrt{x}  - 2 ) \\ ( \sqrt{x}  + 1)( \sqrt{x}  - 2)

4 0
3 years ago
Solve -3(2x - 9) = -3.<br><br> -4<br> 4<br> -5<br> 5
posledela
-3(2x-9)=-3
We have to solve this equation.
-3(2x-9)=-3
-6x+27=-3
-6x=-3-27
-6x=-30
x=(-30)/(-6)=5

answer: x=5
6 0
4 years ago
Read 2 more answers
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