THE FIRST ANSWER is the answer
Answer:
C
Step-by-step explanation:
Using the trigonometric identity
csc x = 
Given
sinΘ = - 0.4, then
cscΘ =
= - 2.5 → C
Speed of trucks= x speed of trains =x-30 A loaded
T=5
4=2+2/5t
Subtract 2 from both sides.
2=2/5t
Multiply both sides by 5/2.
t=5
slope = (y2-y1)/(x2-x1)
= (70-52)/(8-1)
= 18/7
=2.6
point slope form
y-y1 = m(x-x1)
y-52 = 2.6(x-1)
distribute
y-52 = 2.6x-2.6
add 52 to each side
y = 2.6x+49.4
y = 2.6x +49
the initial temperature is 49.4 or about 49
and it increases about 2.6 degrees each week