According to Descartes's rule of sign, how many possible positive and negative roots are there for the equation 0=−8x^10−2x^7+8x^4−4x^2−1?

1. the following set of data represents the number of waiting times in minutes from a random sample of 30 customers waiting for service at a department store. 4 5 7 10 11 11 12 12 13 15 15 17 17 17 17 17 18 20 20 21 22 22 23 24 25 27 27 31 31 32 a. determine the number of classes and class interval.

In the 30-60-90 triangle below side s has a length of and side r has a length

Afarm that has 4 x 10^2 acres has 1.2 x 10^5 cattle. what is the average number of cattle per acre? write the answer in scientific notation. answere asap