If d=2 what is the value of 4d

solve The mean score of a competency test is 60, with a standard deviation of 5. Between what two values do about 68% of the values lie? (Assume the data set has a bell-shaped distribution.

Rewrite in simplest rational exponent form √x • 4√x.

A local manufacturer produced a study in which they randomly selected 100 people from the community and asked if they preferred ice cream or yogurt. 24 responded that they preferred yogurt and 56 responded that they preferred ice cream.

Towns A and B are 400 miles apart. If a train leaves A in the direction of B at 50 miles per hour, how long will it take before that train meets another train, going from B to A, at a speed of 30 miles per hour?

If m ≤ f (x) ≤ M for a ≤ x ≤ b, where m is the absolute minimum and M is the absolute maximum of f on the interval [a, b], then m (b - a) ≤ b f (x) dx a ≤ M (b - a). Use this property to estimate the value of the integral. π/6 5 tan (2x) dx π/8

Determine the y-intercept for 3x + 2y = 14. A) (0, 2) B) (0, 7) C) (2, 0) D) (7, 0)

Give a recursive algorithm matrix-chain-multiply (a, s, i, j) that actually performs the optimal matrix-chain multiplication for a chain of matrices

Solve the equation. - 49f=-3 f=

Let $b$ and $c$ be constants such that the quadratic $-2x^2 + bx + c$ has roots $3+/sqrt{5}$ and $3-/sqrt{5}$. Find the vertex of the graph of the equation $y=-2x^2 + bx + c$.

Jackson earned $60 and put 1 5 of those earnings into his savings account. How much did he put into his savings account?