Questions in mathematics

Questions in mathematics

📝 Answered - $\begin{array}{l} \frac{7^2 \cdot 7^8}{7^4}=\frac{7^a}{7^4}=7^b \\ a=10 \end{array}$ COMPLETE $\begin{array}{l} \frac{2^b}{4}=\frac{2^b}{2^a}=2^b=c \\ a=\square, b=\square, c=\square \end{array}$

📝 Answered - What is the radius of the Brazilian coin that has a circumference of 84.78 mm? Explain your work. Use 3.14 for π.

📝 Answered - The mean of a population being sampled is 64, and the standard deviation is 6. If the sample size is 50, what is the standard error of the mean? (Round off your answer to the nearest hundredth.)

📝 Answered - In the equation [tex]$x / 35=7$[/tex], what is the value of [tex]$x$[/tex]? A) 7 B) 245 C) 35 D) 5

📝 Answered - Determine the product of $\left(46.2 \times 10^{-1}\right) \cdot\left(5.7 \times 10^{-6}\right)$. Write your answer in scientific notation. A) $2.6334 \times 10^{-5}$ B) $2633.4 \times 10^{-5}$ C) $2.6334 \times 10^{-1}$ D) $2.6334 \times 10^{-7}$

📝 Answered - Let [tex]$Z \sim N(0,1)$[/tex]. Find [tex]$a$[/tex] so that [tex]$P(Z > a)=0.23$[/tex]. [tex]$a=$[/tex]

📝 Answered - Complete the table to investigate dilations of exponential functions. | x | 2^x | 3 \cdot 2^x | 2^{3x} | | --- | --- | ----------- | ------ | | -2 | 1/4 | 3/4 | 1/64 | | -1 | 1/2 | 3/2 | 1/8 | | 0 | a | b | c | | 1 | d | e | f | | 2 | 4 | 12 | 64 | a = ? b = ? c = ? d = ? e = ? f = ?

📝 Answered - What is the slope of a line that is perpendicular to [tex]$5 x-2 y=1$[/tex]?

📝 Answered - Which line is perpendicular to a line that has a slope of $-\frac{5}{6}$? line JK line LM line NO line PQ

📝 Answered - Solve: $5|x+7|+2>8$ The answer has the form: $(A, B)$ $(-\infty, A) \cup(B, \infty)$