3 x-intercepts:
1) x = -1
2) x = 3
3) x = 4
2x -1 <7 ; then, 2x < 8; then x < 4;
5x + 3 < 3; then, 5x < 0; then x < 0;
Finally, {x / x < 0};
Answer:


Step-by-step explanation:
step 1
Find the surface area
we know that
the surface area of a sphere is equal to

substitute

substitute the approximate value of pi (3.14)

step 2
Find the volume
The volume is equal to

substitute


Answer:
Step-by-step explanation:
hypotenuse (h) = 9.4
base(b) = 1.9
cos x = b/h
cos x = 1.9/9.4
x = cos ^-1 ( 1.9/9.4)
x = 78.3°
hope it will help :)

It should be x=11 instead of x=-11, so
he is not correct because he made a sign error.