What is the class boundary between the first and second classes?

Mathematics

1 answer:

dimulka [17.4K]3 years ago

7 0

Answer:

Wealth

Step-by-step explanation:

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Algebraic expression for p multiplied by 3

grigory [225]

Answer:

Step-by-step explanation:

Most people might write p*3, which is correct but most teachers/ people perfer to write it as 3p.

3 0

3 years ago

Rob is saving to buy a new MP3 player for every $16 he earns babysitting he saved $5 on Saturday rob earned $80 babysitting how

12345 [234]

Answer:

He saved $25.

Step-by-step explanation:

If Rob saves $5 for every $16 he earns, he is saving the folowing franction of his income: $\frac{5}{16} =0,3125=31,25\%$ .
Then if his income equals $16, he will save $\$16\times{0,3125}=\$5$ .
If his income is $80, he will save $\$80\times{0,3125}=\$25$
Another way to understand this problem would be to think that $\$80=5\times{\$16}$ . Then, receiving $80 is the same as receiving 5 times $16. If he saves $5 for every $16 he receives, he would save 5 times $5 = $25.

5 0

4 years ago

H=7 + 29t-16t^2 find all values of t for which the balls height is 19ft

NikAS [45]

$\bf \qquad \textit{initial velocity}\\\\
\begin{array}{llll}
\qquad \textit{in feet}\\\\
h(t) = -16t^2+v_ot+h_o
\end{array} 
\quad 
\begin{cases}
v_o=\textit{initial velocity of the object}\\
h_o=\textit{initial height of the object}\\
h=\textit{height of the object at "t" seconds}
\end{cases}\\\\
-------------------------------\\\\$

$\bf h(t)=7+29t-16t^2\qquad h(t)=19\implies 19=7+29t-16t^2
\\\\\\
16t^2-29t+12=0\impliedby \textit{now, let's use the quadratic formula}
\\\\\\
t=\cfrac{-(-29)\pm\sqrt{(-29)^2-4(16)(12)}}{2(16)}\implies t=\cfrac{29\pm\sqrt{841-768}}{32}
\\\\\\
t=\cfrac{29\pm\sqrt{73}}{32}\implies t\approx 
\begin{cases}
1.17\\
0.64
\end{cases}$

so hmm check the picture below, thus the ball hits 19 feet of height twice, once on the way up, and once on the way down, at about 0.64 seconds and at 1.17 seconds.