Find the mean of the data given. Number of apps on five friends' smart phones: 42,42,23,75,64

Use letters to represent each simple statement in the compound statement that follows. Then express the compound statement in symbolic form. Shooting unarmed civilians is morally justifiable if and only if bombing them is morally justifiable, and as the former is not morally justifiable, neither is the latter.

Find the indefinite integral.

$$\int \cosh 4 x d x$$

Find the mean of the data given. Number of pets in six families: 3,0,2,4,2,1

Graph each equation.

$$x+3=y$$

Number of pets in six families: 3, 0, 4, 2, 1

An environmental study suggests that $t$ years from now, the average level of carbon monoxide in the air will be

$$Q(t)=0.05 t^{2} + 0.1 t+3.4$$

parts per million (ppm). By approximately how much will the carbon monoxide level change during the next 6 months?

$$2 \frac { 2 } { 3 } \div 1 \frac { 1 } { 2 }$$

How do you retrieve data from an Entry widget?.

Determine whether the sequence is increasing, decreasing or neither. $a_{n}=\frac{n-1}{n+1}$

Express the limit as an integral (or multiple of an integral) and evaluate.

$$\lim _ { N \rightarrow \infty } \frac { 5 } { N } \sum _ { j = 1 } ^ { N } \sqrt { 4 + 5 j / N }$$

Sketch and identify the surface. $9 x^{2}+y^{2}+z=9$

Find the indicated limits. $\lim _{t \rightarrow 1} \frac{\ln (\ln t)}{\ln t}$

Uranium-238 $(U^{238} )$ has three more neutrons than uranium-235 $(U^{235} )$ . Compared to the speed of sound in a bar of $U^{235}$ , is the speed of sound in a bar of $U^{238}$ higher, lower, or the same? Explain your choice, including justification for assumptions you make.