What is the formula for ammonium chromate ?

Find the value of the sum. $\sum_{i=1}^{n} i(i+1)(i+2)$

For the following, convert the given polar equation to a Cartesian equation. Write in the standard form of a conic if possible, and identify the conic section represented.

$$r=\frac{4}{\sin \theta+7 \cos \theta}$$

Write each expression in expanded form and then find the sum. $\sum_{k=1}^{\infty}(0.4)^{k}$

Write the sum in expanded form $\frac{1}{7} \sum_{i=1}^{7} x_{i}$

Let P=(x, y) be a point on the graph of y=$x^2-8$. Express the distance d from P to the origin as a function of x.

What is wrong with the formula $\mathrm{RbCl}_3$ ? What is wrong with the formula $\mathrm{SNa}_2$ ?

What is the formula of diphosphorus pentoxide?

What is the formula for lithium sulfate?

Write an equation for the parabola with vertex at the origin.

Through $(\sqrt{3}, 3)$; opening upward

Find the limit. $\lim _{x \rightarrow 1^{-}} \sqrt{1-x^{2}}$

Find the equation of the plane through the origin that is perpendicular to the line of intersection of the planes in Problem $20$.

Find the limit. $\lim _{x \rightarrow 2^{-}} e^{3 /(2-x)}$

Determine whether the statement is always, sometimes, or never true. Explain your reasoning.

There are at least three lines through points J and K.