Cost of the current plan: $175
Number of devices: x
Cost of the new plan: $94+($4.50/device)x
Cost of the new plan is less than the current plan:
$94+($4.50/device)x<$175
Solving for x:
$94+($4.50/device)x-$94<$175-$94
($4.50/device)x<$81
(device/$4.50)($4.50/device)x<(device/$4.50)($81)
x<18 devices
Please, see the attached file.
Thanks.
Cos(68)=z/24
Z=24cos(68)
Find the answer by the calculator
Second question,
Cos(x)=16/34
X=cos^-1(16/34)
Use calculator
3230 kilograms of the soil supplement are required for the entire vineyard
<h3>Further explanation</h3>
Some units that need to be recalled are as follows :
<em>1 km = 1000 m = 10³ m</em>
<em>1 km² = 1000000 m² = 10⁶ m</em>
<em>1 km² = 247 acres</em>
<em>1 kg = 1000 g</em>
Let's tackle the problem now!
A vineyard has 145 acres of Chardonnay grapes.



A particular soil supplement requires 5.50 grams for every square meter of vineyard.







<h2>Conclusion :</h2>
It required 797500/247 kg ≈ 3230 kg of the soil supplement for the entire vineyard
<h3>Learn more</h3>
<h3>Answer details</h3>
Grade: Middle School
Subject: Mathematics
Chapter: Arithmetic
Keywords: Addition , Subtraction , Multiplication , Division , Number , Expression , Time , Duration , Write
Number of children from an after school that went to the martinee = 40
Percentage of children from an after school that went to the martinee = 25%
Let us assume the number of children in the club = x
Then
25% * x = 40
(25x/100) = 40
x/4 = 40
x = 40 * 4
= 160
So the total number of children in the club is 160. I hope the procedure is clear enough for you to understand. you can always use this method for solving similar problems without requiring any help from outside.
Answer:
<em>Area</em><em> </em><em>of</em><em> </em><em>triangle</em><em> </em><em>=</em><em>1</em><em>/</em><em>2</em><em>×</em><em>base</em><em>×</em><em>height</em>
<em>Area</em><em> </em><em>of</em><em> </em><em>circle</em><em> </em><em>=</em><em> </em><em>pie</em><em> </em><em>×</em><em> </em><em>radius</em><em> </em><em>^</em><em>2</em>