Basic Concepts Compute the following with mathematica

1) Find the square root of 49.

2) Find the cube root of 125.

3) Find the decimal value of the square root of 91 to 15 decimal places.

4) Find the absolute value -43.

5) Round 5.49.

6) Find the ceiling of 5.49.

7) Find the Cosine of Pi/3.

8) What is 10 factorial?

9) What is the sign of -31.2?

10) Find a random number between 15 and 30.

11) Find the 40th Prime number.

12) What is the 30th number in the Fibonacci sequence?

13) Divide 6 into 51. Find the quotient and remainder.

14) Find the Least Common Multiple of 24 and 36.

15) Find the Greatest Common Divisor of 24 and 36.

16) Find all the prime factors of 12.

17) Is 25 a prime number?

18) Graph x^2 + 7x -3, -10<x<10