The efficiency of an internal combustion engine is given below, where v1/v2 is the ratio of the uncompressed gas to the compressed gas and c is a positive constant dependent on the engine design. Efficiency (%) = 100 1 − 1 (v1/v2)c Find the limit of the efficiency as the compression ratio approaches infinity. %

a complex number is a number that can be expressed in the form a + bi, where a and b are real numbers, and i is a solution of the equation x2 = −1. because no real number satisfies this equation, i is called an imaginary number. has no real solution, since the square of a real number cannot be negative.

-4

step-by-step explanation:

(-4+8)=-(4-8)=-8+4=-4

1,589.63 in.^3

step-by-step explanation:

i hope this you : d

c. y = 1/4 x + 5

step-by-step explanation:

first, put the equation of the line on the graph into slope-intercept form

(y = mx + b):   y = -4x + 8

second, a perpendicular line has to have "an opposite/reciprocal slope" to the original slope. so, find the "m" value in your original equation (it's -4, right? )

original slope: m = -4   perpendicular slope: change the sign to its opposite and find the reciprocal ("flip" the number)

new slope is now positive (b/c the original slope was negative 4), and it's 1/4 (not the original slope of 4 or 4/1)