exam Maths Puzzle Numerical Ability

Please help me solve the below problems. Thank you!

A.) For his long distance phone calls, Mike pays $6 monthly fee plus cents per minute. Last Month, Mike's long distance bill

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exam Other Question

Let A be an nxn normal matrix with nonzero eigenvalues k1, k2, ... , kr and corresponding eigenvectors x1, x2, ... , xr where r is less than or equal to n. Show that b is in the s What is the simplest form of (3^n)(9^n-2)sqrt4(^4n+2)/4(^2n+1) Note:the 4(^2n+1) is the denominator