exam Maths Puzzle Numerical Ability

Find an approximate rational solution to 2x(2with exponent x) I tried to put in my TI89 as follows but it won�t give a decimal answer.
Solve(2^x=7,x)
Thanks!

Read Solution (Total 0)

exam Other Question

The $75 dollar cost for a party was to be shared equally by all those attending. Since 5 more people attended than was expected, the price per person dropped by 50 cents. How many people attended the party? Floor plans for a building have the four corners to a room located at points (2,3), (11,6), (-3,18) and (8,21). Determine whether the side through the

points (2,3) and (11,6) is perpendicular to the side through the points (2,3) and (-3,18).