These are the means and standard deviations for examples of heights from two kinds of trees.
table:
tree a - (mean: 25ft) (standard deviation: 5ft)
tree b - (mean: 60 ft) (standard deviation: 12 ft)
select the two true statement.
a. tree a's heights are more spread out than tree b's heights.
b. tree a's heights are less spread out than tree b's heights.
c. tree a has a greater average height than tree b.
d. tree a has a lower average height than tree b.

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.

When y’all answer can y’all explain too !

The edge of a cube was found to be 30 cm with a possible error in measurement of 0.4 cm. use differentials to estimate the maximum possible error, relative error, and percentage error in computing the volume of the cube and the surface area of the cube. (round your answers to four decimal places.) (a) the volume of the cube maximum possible error cm3 relative error percentage error % (b) the surface area of the cube maximum possible error cm2 relative error percentage error %