Answer:
x =7
Step-by-step explanation:
16:28=4:x
16*x=28*4
x=28*4/16
x=112/16
x=7
Answer:
i thought it was 5 maybe not
Step-by-step explanation:
Answer:
192$
Step-by-step explanation:
0.20 x 160= 32
1 x 160= 160
32+160= 192
Answer:
0.025 ;
(-0.7198 ; 0.7698)
Step-by-step explanation:
From the table :
_____________ private schls ___ public schls
Sample size, n _____ 80 __________ 520
P, NBC teachers ___ 0.175 ________ 0.150
P1 = P of private school teachers
P2 = P of public school teachers
Difference in proportion :
P1 - P12 = 0.175 - 0.150.= 0.025
The 90% confidence interval for 2 - sample proportion :
C.I = (p1-p2) ± [Zcritical * √(p1(1-p1)/n1 + (p2(1-p2)/n2)]
Zcritical at 90% = 1.645
C.I = 0.025 ± [1.645 * √((0.175*0.825)/80 + (0.150*0.850)/520)]
C.I = 0.025 ± [1.645 * √(0.0018046875 + 0.0002451)]
C.I = 0.025 ± 1.645 * 0.0452755
C.I = 0.025 ± 0.07448
C.I = (-0.7198 ; 0.7698)
Answer:
$23.6
Step-by-step explanation:
The lunch normally costs $20
But you give a 18% TIP on top of that
Certainly, it will cost more. Lets find out how much exactly.
First, we need to find 18% of 20 and then ADD it to 20 to find FINAL LUNCH COST.
To convert percentage to decimal, we divide by hundred. After that we multiply with 20 to get 18% of 20. Process shown belowL
18% = 18/100 = 0.18
Then,
0.18 * 20 = $3.6
Adding to $20, we get total cost:
20 + 3.6 = 23.6 dollars
Total Cost = $23.6