Since \(x=-\frac{3}{4}\) is a rational number (can be written as a ratio of two integers), then: \(f-\frac{3}{4}=0\)

Since \(x=-\sqrt 2\) is an irrational number, then: \(f(-\sqrt 2)=1\)

Since \(x=\pi\) is an irrational number, then: \(f(\pi )=1\)

Question

asked 2021-06-28

Evaluate \(f(−34), f(−2–\sqrt )\), and \(\displaystyle{f{{\left(\pi\right)}}}\).

asked 2021-05-09

The table shows the number of students in a school's beginning and advanced orchestra classes. The student pay a fee for instruction books: $5 for brass, $5 for woodwinds, and $8 for strings. Find the amount each class will spend on books. Brass Strings Woodwinds amp; Advanced amp;12amp;22amp;18amp; Beginning amp;28amp;25amp;30
Brass
Strings
Woodwinds
amp; Advanced
amp;12
amp;22
amp;18
amp; Beginning
amp;28
amp;25
amp;30

asked 2021-05-12

If 20% of the \(\displaystyle{89}^{{{S}{r}}}\) remains in the body after 90 days, write a function of the form \(\displaystyle{Q}{\left({t}\right)}={Q}{0}{e}^{{−{k}{t}}}\) to model the amount Q(t) of radioactivity in the body t days after the initial dose.

b. what is the biological half-life of \(89^{Sr}\) under this treatment? Round to the nearest tenth of a day.

asked 2021-07-01

The college physical education department offered an advanced first aid course last semester. The scores on the comprehensive final exam were normally distributed, and the z scores for some of the students are shown below: Robert, 1.10 Juan, 1.70 Susan, -2.00 Joel, 0.00 Jan, -0.80 Linda, 1.60 If the mean score was μ=150μ=150 with standard deviation σ=20,σ=20, what was the final exam score for each student?