Answer:
6.81m
Step-by-step explanation:
Using the formula for finding the length of am arc
L = theta/360° × 2πr
theta is the angle subtended by the drum in rotation
r is the radius of the drum
Given theta = 315.7°
r = 1.1m
Substituting the given values into the formula we have:
L = 315.7/360 × 2π(1.1)
L = 315.7/360 × 2.2π
L = 315.7/360 × 2.2(3.14)
L = 315.7/360 × 6.91
L = 6.81metres
Line of about 6.81metres will be wounded around the drum
Answer:
2(2r + 1)(2r - 5)
Step-by-step explanation:
Given
8r² - 16r - 10 ← factor out 2 from each term
= 2(4r² - 8r - 5)
To factorise the quadratic
Consider the factors of the product of the coefficient of the r² term and the constant term which sum to give the coefficient of the r- term.
product = 4 × - 5 = - 20 and sum = - 8
The factors are + 2 and - 10
Use these factors to split the r- term
4r² + 2r - 10r - 5 ( factor the first/second and third/fourth terms )
= 2r(2r + 1) - 5(2r + 1) ← factor out (2r + 1) from each term
= (2r + 1)(2r - 5), so
4r² - 8r - 5 = (2r + 1)(2r - 5) and
8r² - 16r - 10 = 2(2r + 1)(2r - 5) ← in factored form
Answer:
Step-by-step explanation:
8x5 = 40
Because you just go up by fives like 5 10 15 20 25 30 35 40 and so on
Answer:
4, 9 grammes = 0,0049 kilogrammes
Step-by-step explanation:
kg / hectogramme / décagramme / GRAMME /décigramme/centigramme /milligramme
le gramme est l'unité principale / the unit reference
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