An archaeological excavation at burnt mesa pueblo showed that about 10% of the flaked stone objects were finished arrow points†. how many flaked stone objects need to be found to be 90% sure that at least one is a finished arrow point? (hint: use a calculator and note that p(r ≥ 1) ≥ 0.90 is equivalent to 1 − p(0) ≥ 0.90, or p(0) ≤ 0.10.) objects

$53.50

step-by-step explanation:

you have to subtract the amount of money chuck earned ($72.50) by the cost of the gas for the mower ($11.25) and the new string for the trimmer he bought ($7.75).

72.50-11.25=61.25

and then subtract $61.25 by the second thing he bought (the new string for the trimmer)

61.25-7.75=53.5

so in total it's $53.50 (53 dollars and 50 cents)

70

step-by-step explanation:

2*5=10

4*15=60

60+10=

70

the inequality is:

250c+180g≥950

step-by-step explanation:

let c denotes the number of days in a week   miyoko worked as a cryptographer.

and g denotes the number of days in a week she works as a geologist.

now we are given that she earns $250 for every day she works as a cryptographer,and earns $180 for every day she works as a geologist.

now miyoko's goal is to earn more than $950 this week.

hence, the inequality could be represented as:

250c+180g≥950

i dont know men

step-by-step explanation: