How many times greater is 10^7 than 10^5

A. One tenth
B. Ten
C. One hundred
D. One thousand

Find the number of real number solutions for the equation. x2 + 5x + 7 = 0 0 cannot be determined 1 2

3.4a=57.8 what is the the value of a

Rachel is studying the population of a particular bird species in a national park. she observes every 10th bird of that species that she can find in the park. her conclusion is that the birds living in the park who belong to that species generally feed on insects. rachel's sample is . based on the sample she picked, rachel's generalization is