Answer:
y = 1%
Step-by-step explanation:
From the formula;
Interest; i = PRT/100
P = £5000
R = 10%
After 1 year, we have;
i = 5000 × 10 × 1/100 = £500
Amount is now; 5000 + 500 = £5500
Since interest rate is now y% every year after the first one, then;
After 2nd year;
i = (5500 × y × 1)/100
i = 55y
So amount is now;
5500 + 55y
After 3rd year, interest is now;
i = (5500 + 55y) × y × 1/100
i = 55 + 0.55y²
Amount is now;
(5500 + 55y) + (55 + 0.55y²)
Since she has £5610.55 after 3 years, then;
(5500 + 55y) + (55 + 0.55y²) = 5610.55
0.55y² + 55y + 5555 - 5610.55 = 0
0.55y² + 55y - 55.55 = 0
From quadratic formula, y = 1%
Answer:
x = h = ∛7 cm ≈ 1.913 cm
Step-by-step explanation:
The volume and other dimensions are related by ...
V = Bh = x²h
Solving for h gives ...
h = V/(x²)
The surface area is ...
S = 2(x² +h(2x)) = 2x² +4x(V/(x²)) = 2x² +4V/x
Differentiating with respect to x, we can find where the derivative is zero.
S' = 4x -4v/(x²) = 0
x³ -V = 0 . . . . . . . multiply by x²/4
x = ∛V . . . . . . . . . solve for x
h = V/(∛V)² = (∛V)³/(∛V)² = ∛V
The surface area is minimized when the box is a cube. Its edge lengths are all (∛7) cm ≈ 1.913 cm.
Answer:
5. M is 294,if you check 294 over 7 (294÷ 7) is 42!
6. X Is 8
It is 4 x (something (x) +2 = 36) First we need to know what times 4 is 36.
36 ÷ 4 = 8 ! So the (Somthing is 6!Since 6 + 2 is 8!
7.D is 80
<em>r </em>is 20 and <em>t</em> is 4,if to number are next to each other but not a number like <em>r t </em>that means they are multipled together, 20 x 4=80!
8.X is 2.83
(rounded from 2.828) 
Means that something times itself.
9. 63 feet
10.30 inches
Hope this helped!
Good luck
Answer:
t = 68000 s
Step-by-step explanation:
Given that,
The average time Sally spent for training for her weight lifting competition in the month of May is 
.
We need to write this time in standard notation.
The power of 10 is 4. 10⁴ can be written as 10000.
So, the standard time is equal to 68000 s.
Answer:
its iy 1 4, 777,
Step-by-step explanation:
i can do if 6 m gosr omg
