Answer:
- We would use the explicit formula
Step-by-step explanation:
<u>The recursive formula is good to find the next term, example:</u>
<u>You would need the explicit formula to find any term, example:</u>
The two equations are equivalent.
The postage for 3 posters is $5.
Lois$ wrote an expression for the total they both spent as 6x + 10 6(25) +10
150 +10 = 160
Clark wrote another expression for the total, saying that it represented the same cost: 2(3x + 5). = 2(3x) + 2(5) 6x + 10 = 6(25) + 10 = 150+10 160
If each poster costs $25, do the two expressions give the same amount?
Answer:
750
Step-by-step explanation:
multiply 125 and 6
The answer is 7<span>1.6 g
</span>
Step 1: Calculate the number of moles using the Avogadro's number.
Step 2: Calculate the mass using the number of moles and atomic mass of titanium.
Step 1.
Avogadro's number is the number of units in 1 mole of substance:
6.023 × 10²³ units (atom) per 1 mole
<span>
Calculate the number of moles by using the proportion:
</span>6.023 × 10²³ atom : 1 mole = 9.0 × 10²³ atom : x
x = 1 mole * 9.0 × 10²³ atom / 6.023 × 10²³ atom
x = 1.4942 moles
Step 2.
The atomic mass of titanium is: Ar = 47.867 g
This means that in 1 mole, there are 47.867 g in 1000 ml
And we need to calculate the number of grams in 1.4942 moles:
47.867 g : 1 mole = x : 1.49 moles
x = 1.4942 moles * 47.867 g / 1 mole
x ≈ 71.6 g
Answer:
14
Step-by-step explanation:
By the property of intersecting secants outside of the circle.
