Topic
Q:
Gegee die funksie \( f(x)=3^{-x} \).
6.1 Gee die vergelyking van \( g \) indien \( g \) die refleksie van \( f \) in die \( y \)-as is en wat
3 eenhede afwaarts geskuif word.
B.2 Bereken die \( x \)-afsnit van \( g \).
Q:
The weights for newborn babies is approximately normally distributed with a mean of 6 pounds and
standard deviation of 1.5 pounds.
Consider a group of 1100 newborn babies:
1. How many would you expect to weigh between 3 and 8 pounds?
2. How many would you expect to weigh less than 7 pounds?
3. How many would you expect to weigh more than 6 pounds?
4. How many would you expect to weigh between 6 and 9 pounds?
Q:
What is the difference between the explicit formula and recursive formula for sequences when would you use one over the other
Q:
The function \( A=A_{0} e^{-0.01155 x} \) models
the amount of a particular radioactive
material stored in a concrete vault, where
\( x \) is a number of years since the
material wis put into the vault. Suppose
400 pounds of the material are initally
put into the vault. Ansuer the folloving
questions:
a) How many pounds will be left after
130 years? (Round to nearest whole number)
b) After how many yews will there be 50 pounds
remaining? (Round to newest whole number)
Q:
The function \( A=A_{0} e^{-0.01155 x} \) models
the amount of a particular radioactive
material stored in a concrete vault, where
\( x \) is a number of years since the
material wes put into the vault. Suppose
400 pounds of the material are initally
put into the vault. Ansuer the folloving
questions:
a) How many pounds will be left after
130 years? (Round to nearest whole number)
b) After how many yews will there be 50 pounds
remaining? (Round to newast whole number)
Q:
Bepaal die waarde(s) van \( x \) waarvoor die volgende uitdrukking reëel sal wees:
\( \frac{\sqrt{x+3}}{2} \)
Q:
0355. Постройте график линейной функции \( y=0,4 x \). Найдите по
графику:
а) значение \( y \), соответствующее значению \( x \), равному \( 0 ; 5 \);
Q:
Vergelyk die volgende getalpatroon met die oorspronklike getalpatroon wat in
VRAAG 3.1 hierbo gegee is:
\[ 4 ; 28 ; 70 ; 130 ; \ldots \]
3.2.1 Beskryf, in woorde, hoe hierdie nuwe patroon gevorm is.
3.2.2 Bepaal die waarde van die \( 15^{\text {de }} \) term in hierdie patroon.
Q:
A variable \( x \) is normally distributed with mean 21 and standard deviation 5.
a) Determine the \( z \)-score for \( x=27 \).
b) Determine the \( z \)-score for \( x=15 \).
c) What value of \( x \) has a \( z \)-score of 1.8 ?
\( x=x= \)
d) What value of \( x \) has a \( z \)-score of -0.6 ?
e) What value of \( x \) has a \( z \)-score of 0 ?
\( x= \)
Q:
5. \( \frac{11}{5}+\frac{4}{21} \) of \( 42-\frac{18}{5} \div \frac{27}{45} \)
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