Tracey and Mark recorded the number of customers waiting in the first 5 checkout lines at two different grocery stores at the same time of day on the same day of the week. Tracey found {2, 2, 3, 3, and 4} waiting customers in store A. In store B, Mark found {3, 4, 4, 4, and 5} waiting customers. Which one of the following statements is true? Store A has a spread of 2.8.

Store A has a spread of 2.8.

Stores A and B have an equal spread.

Stores A and B have an equal spread.

Store B has a greater spread than store A.

Store B has a greater spread than store A.

Store B has a spread of 4.

Browning labs is testing a new growth inhibitor for a certain type of bacteria. the bacteria naturally grows exponentially each hour at a rate of 6.2%. the researchers know that the inhibitor will make the growth rate of the bacteria less than or equal to its natural growth rate. the sample currently contains 100 bacteria. the container holding the sample can hold only 300 bacteria, after which the sample will no longer grow. however, the researchers are increasing the size of the container at a constant rate allowing the container to hold 100 more bacteria each hour. they would like to determine the possible number of bacteria in the container over time. create a system of inequalities to model the situation above, and use it to determine how many of the solutions are viable.

Simplify. −4x^2 (5x^4−3x^2+x−2) −20x^6−12x^4+8x^3−8x^2 −20x^6+12x^4−4x^3+8x^2 −20x^8+12x^4−4x^2+8x −20x^6+12x^4+4x^3−8x^2

The figure below shows rectangle abcd and the triangle eca on a coordinate plane. which of the following expressions represents the perimeter of triangle of triangle eca in units