C10 Prathyush P4

Are the fractions equivalent?

• Yes
• No

What is the formula for calculating the new value when decreasing a number by a percentage?

• Original Value × (1 - Percentage Decrease in Decimal)

• Original Value × (1 + Percentage Decrease in Decimal)

• Original Value - Percentage Decrease

• Original Value + Percentage Decrease

Calculate the percent increase. Round to the nearest percent.

Original: 45

New: 92

• 51%

• 1.04%

• 104%

• .51

Lacey bought a new purse that originally cost $25 and is on sale for $15. Find the percent of change in the price in the purse.

• Decrease of 40%
• Decrease of 10%
• Decrease of 30%
• Decrease of 20%

A hockey stick originally cost $79. How much will Steven save if he has a coupon for 20% off?

• $63.20

• $15.80

• $3.95

• $63.20

An initial 10,000 TikTok followers decreased by 5% each month. How many followers will there be after 6 months? Round to the nearest follower. There are no partial followers.

• 13,401

• 7,351

• 156

• 9,999

Multiply:
(3.4 x 10⁵)(1.2 x 10^-3)

• 4.08 x 10^-8
• 4.8 x 10²
• 4.08 x 10²
• 4.08 x 10^-15

Multiply:
(9.4 x 10⁶)(3.2 x 10⁵)

• 30.08 x 10¹¹
• 3.8 x 10¹
• 3.008 x 10¹²
• 2.9375 x 10¹

The closest star to the Sun is Proxima Centauri, which is 4.24 light years away. A light year is  $5.9\times10^{12}miles$  .  What is this distance expressed in scientific notation?

•  $25016\times10^9miles$  

•  $2501.6\ \times10^{10}miles$  

•  $250.16\times10^{11}miles$  

•  $25.016\times10^{12}miles$  

•  $2.5016\times10^{13}miles$  

 $\frac{9.6\times10^{-8}}{2\times10^{-15}}$  

•  $-4.8×10^7$  

•  $4.8×10^7$  

•  $4.8×10^{-7}$  
  

•  $4.8×10^{-23}$