Which number's estimate written as a single digit times a power of 10 will have a negative exponent? ​

News cameras take an overhead picture of a crowd at an outdoor event journalist then count the total number of people in the picture and use the sample of estimate the total number of people in the crowd this process is an example of

5x−4≥12 or 12x+5≤−4 can you with this problem

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)