Question

30 % decrease in a temperature of 40° Celsius

Answer 1

Answer:

The "general" form of a parabola's equation is the one you're used to, y = ax2 + bx + c — unless the quadratic is "sideways", in which case the equation will look something like x = ay2 + by + c. ... State the vertex and focus of the parabola having the equation (y – 3)2 = 8(x – 5).

Answer 2

Answer:

ANSWER

If initial temperature is T, final temperature is T+

100

40

×T=1.4T

If initial volume is V, final volume is V−

100

20

×V=0.8V

Applying the gas equation, we get

T

1

P

1

V

1

=

T

2

P

2

V

2

If initial pressure is P, final pressure =

0.8V×T

1.4T×V×P

=1.75P

∴ Increase in pressure =1.75−1=0.75

Percentage increase =0.75×100=75%

Hence, option C is correct.