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3 years ago

3.8 is what in percent 1.9375 is what in percent

Mathematics

1 answer:

Slav-nsk [51]3 years ago

3 0

we know 1.9375 is the 100%, what is 3.8 off of it in percentage?

$\bf \begin{array}{ccll} amount&\%\\ \cline{1-2} 1.9375&100\\ 3.8&x \end{array}\implies \cfrac{1.9375}{3.8}=\cfrac{100}{x}\implies 1.9375x=380 \\\\\\ x = \cfrac{380}{1.9375}\implies x \approx 196.129$

let's notice that 3.8 is about twice as much as 1.9375.

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ΔCAR has coordinates C (2, 4), A (1, 1), and R (3, 0). A translation maps point C to C' (3, 2). Find the coordinates of A' and R

shutvik [7]

Answer:

$A'= (2,-1)$ and $R'=(4,-2)$ under this translation.

Step-by-step explanation:

A translation in $R^{2}$ is a mapping T from $R^{2}$ to $R^{2}$ defined by $T(x,y) = (x + v_1,y+v_2)$ , where $v=(v_1,v_2)$ is a fixed vector in $R^{2}$ .

From the problem we know that $T(2,4)=(3,2)$ , so we need to find the values $v_1$ and $v_2$ such that $T(2,4) = (2 + v_1,4+v_2)=(3,2)$ , so $3=2 + v_1$ and $4+v_2=2$ , thus $v_1=1$ and $v_2=2$ .

Then $T(x,y) = (x + 1,y-2)$ and

$T(1,1)=(1+1,1-2)=(2,-1)=A'$

$T(3,0)=(3+1,0-2)=(4,-2)=R'$

Therefore $A'= (2,-1)$ and $R'=(4,-2)$ . The triangles CAR and C'Q'R' are shown in the figure below.

7 0

3 years ago

A sample of 140 Vopstra customers have had their annual phone charge recorded for the previous calendar year. The data were used

taurus [48]

Answer:

Correct option: (a)

Step-by-step explanation:

A confidence interval is an interval estimate of the parameter value.

A (1 - α)% confidence interval implies that the confidence interval has a (1 - α)% probability of consisting the true parameter value.

If 100 such confidence intervals are made then (1 - α) of these intervals would consist the true parameter value.

The 92% confidence interval for the mean annual phone charge of all Vopstra customers is:

$\$470\pm \$65=(\$405, \$535)$

This confidence interval implies that true mean annual phone charge of all Vopstra customers is contained in the interval ($405, $535) with 0.92 probability.

Thus, the correct option is (a).

6 0

3 years ago

Someone help !!! ill do anything i promise

prisoha [69]

Answer:

1/600, 6/100, 1/1400

Step-by-step explanation:

4 0

3 years ago

A.) $405.00

marshall27 [118]

$450 since first month was free if it wasn’t free it would’ve been $495

3 0

3 years ago

katelyn has taken 4 math quizzes. Her scores were 75,80,97, and 92. What must she get on her next quiz to have an average of at

Vilka [71]

To find the average add all the numbers together then divide by how many numbers there are.

75+80+97+92=344 divided by 4 = 86

So her average right now is 86.

She’d have to make 96 to get an average of 88.

75+80+97+92+96=440 divided by 5=88

The answer is 96

4 0

3 years ago

3.8 is what in percent 1.9375 is what in percent ​

3.8 is what in percent 1.9375 is what in percent