A biologist estimated that the current population of ladybugs in the region was 8.3 × 10^6. He predicts that a swarm of 950,000 ladybugs will be arriving into the region. According to the biologist's estimates, how many ladybugs will be in the region after the swarm arrives?
A. 9.25 × 10^7
B. 9.25 × 10^6
C.1.78 × 10^6
D. 1.78 × 10^7

step-by-step explanation:

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b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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step-by-step explanation:

144.50

step-by-step explanation:

21.5 x 13.4=288.10 divide by 2

answer: 3.26019516

step-by-step explanation: