What is 1.5 x 10^-1 in standard form?

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

Determine the number of outcomes in the event. decide whether the event is a simple event or not. upper a computer is used to select randomly a number between 1 and 9 comma inclusive. event upper b is selecting a number greater than 4. event upper b has nothing outcome(s). is the event a simple event? (yes or no) because event upper b has (fewer than, exactly, more than) one outcome.

Solve the equation x/4 - 5= -8 -27 -12 -7 12