Write the equation of the ellipse with foci at ,  and

style="vertical-align: middle;" data-wiris-created="true" varid="variable_id_field" variablename="impvar_68e78a7447e34410a55886829" />. Express the equation in standard form.

What will be an ideal response?

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Mathematics

The following table shows the number M, in thousands, of magazine subscriptions t years after initial publication. Use exponential regression to model the number of subscriptions as a function of time. Round your answer to two decimal places.  t 1.06 4.33 8.21 12.00 15.70 M 8.16 4.57 2.87 1.13 0.53?

A. ?
B. ?
C.
D. ?

Add or subtract as indicated. Write the answer in simplest form.-  +  + 

A.
B. - 
C.
D. - 

Solve the problem.In triangle ABC, angle A is three times as large as angle C. The measure of angle B is  less than that of angle C. Find the measure of the angles.

A. 78°, 24° and 39° B. 78°, 24° and 78° C. 117°, 24° and 39° D. 117°, 24° and 78°

Diagonalize the matrix A, if possible. That is, find an invertible matrix P and a diagonal matrix D such that   A = 

A.
P = , D = 
B. Not diagonalizable
C.
P = , D = 
D.
P = , D =